单项选择题

If the computer ______ the computations, a signal will be given at once.

A. will finish


B. is finishing
C. is going to finish

D. has finished
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单项选择题
The fire started on the first floor of the hospital ______ were elderly and weak.
A. many of its patients

B. many of whose patients
C. many patients of whom

D. many of which patients
单项选择题
This is the only book ______ I have on chemistry.
A. what

B. what so ever C. which
D. that
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