单项选择题

While（）the book， he nodded from time to time.

A.reading
B. read
C. is reading
D. is read

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单项选择题
The meeting（）next week will be of great importance.

A.to be held
B. held
C. holding
D. is held
单项选择题
________， he had no time to rest.

A.As he was tired
B.If he was tired
C.Tired as he was
D.Now that he was tired
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