单项选择题

He demanded that the problem () at once.

A. would be solved
B. is to be solved
C. is solved
D. be solved

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单项选择题
() a big hole on the road, the car was stopped.

A. Having seen
B. Seeing
C. The driver seeing
D. When seeing
单项选择题
The weather in China is different from ().

A. America
B. in America
C. that in America
D. one in America
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