------When do we need to pay the balance ?------- ________September 30. A．InB．By

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------When do we need to pay the balance ?
------- ________September 30.

A．In

B．By

C．During

D．Within

答案

解析

句意为：什么时候我们需要付余额？到9月30日。在月日前应使用介词on;而选项中没有。During意为“在……期间”；within意为“在……内”；by意为“(表示时间)不迟于; 在…时候”，因此B项最适合。

举一反三

Don’t leave matches or cigarettes on the table within ______of little children.

A．hand

B．reach

C．space

D．distance

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语法填空
If we want to finish anything in life, let us not forget that we must persevere（坚持不懈）. If we want to learn   1  lessons well in school, we must be hard- working and not give up   2  we come to anything difficult. We shall find many of our lessons very hard,   3  let us consider that the harder they are,   4  better they will do to us if we persevere and learn them thoroughly.
But there are some   5  us who are ready to give up when they come to a hard example in mathematics, and say, “I can’t do this.”   6  never will succeed forever if they feel so. Let us remember that we shall meet with many ____7  all through life. If we keep on   8  (try), we shall be sure to conquer and overcome every difficulty we meet with.
And   9  we master our lessons well in school, it will prepare us to overcome the difficult things   10  we shall meet in life when our school days are over.

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Our football team’s ____ has been excellent during the whole year.

A．demand

B．master

C．history

D．performance

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You should try to get a good night’s sleep ____ much work you have to do.

A．however

B．no matter

C．although

D．whatever

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The mayor of Beijing says that all construction work for the Beijing Olympics ____ by 2006.

A．has been completed	B．has completed
C．will have been completed	D．will have completed

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