题目内容

We haven’t seen him ______ he left last year.

A. since
B. when
C. as
D. if

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It’s raining now, ______ you must take the raincoat with you.

A. for
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C. or
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______ you work harder, you’ll do better in your subjects.

A. If
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A. For
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The old man was pleased he could not say a word.

A. either…or
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