Prices reach equilibrium at the level at which quantity demanded ______ quantity

题型：不详难度：来源：

Prices reach equilibrium at the level at which quantity demanded ______ quantity supplied.

A．is equal to

B．equal

C．equals to

D．is equal

答案

解析

语法结构题。本句的难点是：be equal to意为“与…相等”，等于及物动词equal。任at which引导的定语从句中，主语为第三人称单数，而[B]项equal又没有词尾s，C.和D.两项的形式又不正确，所以[A]项正确，因其既合语法也合句意。本句的意思是：物价应在供求量相等的水平上达到平衡。

举一反三

短文改错（共10小题，每小题1分，满分10分）
此题要求改正所给短文中的错误。对标有题号的每一行做出判断：如无错误，在该行右边横线上画一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正：
此行多一个词：把多余的词用斜线（＼）划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
I had to stay later at the hospital that night to         76.
do an operation. I finally 1eft about 11 p.m. I                   77.
drove to home slowly because the weather was                 78.
terrible -- a strong wind was blown and it was                  79.
raining heavy. I was turning into our road when                80.
a man suddenly run in front of my car. I almost                81.
hit him but he stopped just in time. I was very                  82.
frightened and the man looked frightened too. I                83.
got out of the car, but he ran away after I could                84.
ask him if he was right. It was very strange.                      85.

题型：不详难度：| 查看答案

Even though it was only October, my students were already whispering about Christmas plans. With each passing day everyone became more __36__wthting for the final school bell. Upon its _37____everyone would run for their coats and go hone, everyone except David
David was a small boy in ragged clothes. I had often _38___what kind of home life David had, and what kind of mother could send her son to school dressed so __39__for the cold winter months, without a coat, boots, or gloves. But something made David __40__I can still remember he was always __41____a smile and willing to help. He always __42__after school to straighten chairs and mop the floor. We never talked much He__43___just smile and ask what else he could do ,then thank me for letting him stay and slowly__44___home
Weeks passed and the __45___ovre the coming Christmas grew into restlessness until the last day of__46__before the holiday break. I smiled in ___47 __as the last of them hurried out the door. Turning around I saw David ___48___standing by my desk.
“I have something for you” he said ____49____from behind his back a small box. __50___it to me, he said anxiously. “Open it “I took the box from him, thanked him and slowly unwrapped it. I lift the lid and to my __51__saw nothing I looked at David‘s smiling face add back into the box and said. “The box is nice, David, but it’ s__52__”
“Oh no it isn’t” said David “It’s full of love, my mum told me before she died that love was something you couldn’t see or touch unless you know it’s there”
Tears filled my eyes ___53___Iooked at the proud dirty race that I had rarely given____54___to. After that Christmas, David and I became good friends and I never forgot the meaning ___55___the little empty box set on my desk

小题1:

A．anxious

B．courageous

C．serious

D．cautious

小题2:

A．warning

B．ringing

C．calling

D．yelling

小题3:

A．scolded

B．wondered

C．realized

D．learned

小题4:

A．modestly

B．naturally

C．inaccurately

D．inappropriately

小题5:

A．popular

B．upset

C．special

D．funny

小题6:

A．expressing

B．delivering

C．wearing

D．sharing

小题7:

A．practised

B．wandered

C．studied

D． stayed

小题8:

A．would

B．should

C．might

D．could

小题9:

A．aim at

B．turn to

C．put off

D．head for

小题10:

A．argument

B．excitement

C．movement

D．program

小题11:

A．school

B．year

C．education

D．program

小题12:

A．relief

B．return

C．vain

D．control

小题13:

A．weakly

B．sadly

C．quietly

D．helplessly

小题14:

A．searched

B．found

C．raised

D．pulled

小题15:

A．Holding

B．Handing

C．Sending

D．Leaving

小题16:

A．delight

B．expectation

C．appreciation

D．surprise

小题17:

A．cheap

B．empty

C．useless

D．improper

小题18:

A．as

B．until

C．because

D．though

小题19:

A．advice

B．support

C．attention

D．command

小题20:

A．from

B．behind

C．over

D．towards

题型：不详难度：| 查看答案

Nearly________ of the surface of our planet is covered by water.

A．seven-ten

B．seven-tenth

C．seven-tenths

D．seventh-ten

题型：不详难度：| 查看答案

短文改错（共10小题；每小题1分，满分10分）
假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误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。
Dear Mrs. Winthorp,
So my first week at college is over! No lectures this morning so I think I’d email you and let you know what things are going.
I’m glad to say that anything has worked out fine in the dorm. I remember asking for a room as far away from the lifts as possible and they find me a comfortable one on second floor. There are two girls from my course here and I plan to make friend with them so they we can help each other on the course work. Everyone else seems very nice and warmly here.
Well, I had better to stop now. I’m going to attend mine first lesson this afternoon, for I’ve got some preparation to make, Keep in touch.
Best,
Carol

题型：不详难度：| 查看答案

Shortly after the accident, two___________ police were sent to the spot to keep order.

A．dozens of

B．dozens

C．dozen of

D．dozen

题型：不详难度：| 查看答案