单项选择题

（）the temperature falling so rapidly, we couldn't go on with the experiment.

A. Since
B. For
C. As
D. With

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By the year 2010, the earth（）twice as many people as it is today.

A. will have been inhabited
B. will inhabit
C. will have inhabited
D. is going to inhabit
单项选择题
The mother didn't know who（）for the broken glass.

A. blamed
B. be blamed
C. to blame
D. would blame
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