单项选择题

The local health organization is reported ______ twenty-five years ago when Dr. Ardon became its first president.

A. to be set up
B. being set up
C. to have been set up D. having been set up
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单项选择题
The project requires more labor than ______ because it is extremely difficult.
A. has been put in B. have been put in C. being put in
D. to be put in
单项选择题
There is a real possibility that these animals could be frightened, ______ a sudden loud noise.
A. being there
B. should there be C. there was
D. there having been
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