单项选择题

By the time I return, you ______ this book.

A．would finish
B．should have finished
C．would have finished
D．will be finished
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单项选择题
Some people consider ______ cruel to send animals in rockets into space.
A．that is
B．it being
C．it be
D．it
单项选择题
These questions ______ in English.
A．must answer
B．should answer
C．must be answered
C．can answer
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