The opening ceremony was put off ______ the heavy rain.

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A．because　　　B．because of　　　C．since　　　D．as

The doctor did all ______ to save the boy's life．

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A．what he could

B．he could

C．everything which he could

D．for which he could do

Yesterday it was ______ weather that all the people stayed at home.

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A．such cold　　　　B．so cold

C．such a cold　　　D．terrible cold

There is ________ “x” and ________ “u” in the word “excuse”.

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They wanted to use a person ________ him ________ a stepping stone.

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That day he ________ me that he would come.

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He is sure ________ in the match.

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Why ________ some English tapes?

[　　]

We ________ over maths these days.

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________ tonight is impossible.

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