单项选择题

You()him ont though you were very busy.

A.should have helped
B.must help
C.ought to help
D.could have helped

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单项选择题
He()to invest (投资) 10 million dollars to have new classroom buildings built for the children in the mountain area.

A.insisted
B.offered
C.looked forward
D.suggested
单项选择题
The villagers,()had been washed by the flood, called in people's aid.

A.all of whose properties
B.all their properties
C.all whose properties
D.all of their properties
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