单项选择题

It was now clear that no such weapons were manufactured and none been found.()

A. was found
B. were founded
C. has been found
D. have been founded

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单项选择题
Whenever we hear of a natural disaster, we feel sympathetic to the people to be affected.
A. to have affected

B. to have effected
C. who have been effected
D. who have been affected
单项选择题
The advocates—mainly family therapy doctors—are applying a new approach to everything from marriage conflict to psychosis.
A．margin
B．marine
C．marital
D．martial
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