Up to now, no one has come up with a（n） explanation of why dinosaurs died

题型：不详难度：来源：

Up to now, no one has come up with a（n） explanation of why dinosaurs died out, and it remains a mystery．

A．astonishing

B．amusing

C．convincing

D．puzzling

答案

解析

试题分析：A．astonishing 令人惊讶的，B．amusing令人发笑的，C．convincing令人信服的，D．puzzling令人困惑的，句意：直到现在，没有人给出一个令人信服的解释为什么恐龙会灭绝，这仍然是和迷。所以选C。

举一反三

下面文章中有5个段落需要添加小标题。请从以下选项（A、B、C、 D、E和F）中选出符合各段意思的小标题，并在答题纸上将相应选项的标号涂黑。选项中有一项是多余选项。
A．An apple a day keeps the doctor away．
B．Taking a swim after eating will threat your life,
C．Eating more carrots improves your health．
D．Going out in the cold with wet hair causes sickness．
E．Lightning never strikes the same place twice．
F．More crime occurs during a full moon．
Old Wives" Tales Proven Untrue
We all grew up with sayings that were intended to frighten us into being good or convince us to eat better．Looking back, some of these childhood proverbs don’t even make much sense．（Ever hear the claim that swallowed gum stays in your stomach for seven years? Uh-huh, sure．）However, there are quite a few out there that people still believe in．That"s why we decided to investigate some common old wives" tales to see how they hold up under scientific scrutiny．From the moon"s affect on crimes to the true causes of colds, this list is sure to surprise even the most enlightened among you．
小题1:
False: Countless kids were scared into thinking that if they went back in the water less than 60 minutes after eating, they would suddenly cramp up （the muscles get suddenly tightened） and drown．But according to MayoClinic．com, it"s perfectly safe to swim after you eat a light meal or snack． The site does recommend taking a short break after eating a big meal, however, not because of cramping, but due to extreme lack of energy． As is known to us all, after eating, more of our blood goes to help the digestive system．
小题2:
Partially True: This saying has been around since before the discovery of an apple"s vital nutrients: Vitamin C and polyphenols．Regardless, the core of the matter is that while this fruit will help keep you well, it"s not always enough to keep you out of the medical danger zone; When you"re ill, your body requires nutrients from all the different types of food in a well-balanced diet, including fruits, vegetables, yogurt, protein and, of course, chicken soup．Only one kind of specific fruit or food can not solve all the problems．
小题3:
False: According to the National Weather Service, lightning can strike the same place numerous times, especially if it"s a tall, pointed and isolated object． For example, the EmPire State Building, a skyscraper on Fifth Avenue, New York City, USA, which was for long the tallest building in the world, "is hit an average of 25 times a year． That is the reason why it was once used as a lightning laboratory． Lightning often strikes more than three miles from the thunderstorm and laughs at two inches of rubber!
小题4:
False: Neither wet nor dry hair significantly increases your chances of getting sick．WebM D.com says colds are solely caused when viruses are passed from one person to another, so you should be more concerned with how often you wash your hands, not your hair． A proper way to keep healthy is to develop good personal habits of life．Prevention is always the best cure, better than any drug and treatment．
小题5:
False: Many interesting things are thought to increase during a full moon emergency room visits, accidents, ability to have babies, werewolves．Almost all these phenomena are attributed to the Lunar Effect, which tries to link unusual, unbelievable, or unacceptable behavior and the phases of the moon． However, according to myth-buster and syndicated columnist, Cecil Adams, there is no truth at all behind the theory．

题型：不详难度：| 查看答案

On my way home after school there had an accident. A heavy truck hit a bike, caused the young woman on the bike fall to the ground heavily. As a result, one of her legs broken. Blood was running down his leg. A lot of people stood by watching, but everybody gave her a hand. I hurriedly stopped a passed car, and the driver and I carried the injury woman into the car. Then we took her to the hospital of nearby. The doctors treated her in time and she is soon out of danger.

题型：不详难度：| 查看答案

_ 小题1:__ People use money to buy food, furniture, books, bicycles and hundreds of other things they need or want. When they work, they usually get paid in money.
Most of the money today is made of metal or paper. __小题2:__ One of the first kinds of money was shells.
Shells were not the only things used as money. In China，cloth and knives were used. In the Philippine Islands，rice was used as money for a long time. Elephant tusks，monkey tails and salt were used as money in parts of Africa.
The first metal coins were made in China. They were round and had a square hole in the centre. __小题3:__
Different countries have used different metals and designs for their money. __小题4:__ Sweden and Russia used copper to make their money. Later some countries began to make coins of gold and silver.
But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money. __小题5:__ The first paper money looked more like a note from one person to another than the paper money used today.
Money has had an interesting history from the days of shell money until today.

A．The first coins in England were made of tin(锡)．

B．But people used to use all kinds of things as money.

C．No one knows for certain when people began to use money.

D．People strung(串连) them together and carried them from place to place.

E. Money, as we know，is all made of paper.
F. They began to use paper money.
G. Today anyone will accept money in exchange for goods and services.

题型：不详难度：| 查看答案

文中共有十处语言错误，每句中最多两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（^），并在其下面写出该加的词。
删除：把多余的词用斜线（）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
Nowadays Grade Three students are general faced with a lot of pressure, which is rather common. The followed suggestions may help reduce it. First of all, know exactly what lead to your pressure, and then you can take measures to deal with it. Secondly, set up a goal what is not too high, in another words, don’t put too much pressure on yourself. Thirdly, finding a way to relax yourself occasionally. For example, you can listen to music, go swim or just simply go walking. Lastly, make friend with others, such as your classmates, your teachers, your parents. They will understand you and come to your help when you are really in the trouble. In a word, never get yourself stuck in the pressure for “impossible is nothing”.

题型：不详难度：| 查看答案

Once there lived a rich man   小题1: wanted to do something for the people of his town.   小题2:  first he wanted to find out whether they deserved his help.
In the centre of the main road into the town, he placed   小题3:  very large stone. Then he   小题4: (hide ) behind a tree and waited. Soon an old man came along with his cow.
“Who put this stone in the centre of the road?” said the old man, but he did not try to remove the stone. Instead, with some difficulty he passed around the stone and continued on his way.   小题5:  man came along and did the same thing; then another came ,and another. All of them complained about the stone but not tried to remove 小题6: . Late in the afternoon a young man came along. He saw the stone,   小题7:(say) to himself: “The night   小题8: (be) very dark. Some neighbors will come along later in the dark and will fall against the stone.”
Then he began to move the stone. He pushed and pulled with all his   小题9:  (strong) to move it. How great was his surprise at last!   小题10:  the stone, he found a bag of money.

题型：不详难度：| 查看答案