单项选择题

—The ground is wet.
—It must have rained last night, ______.

A. hasn’t it
B. didn’t it
C. mustn’t it
D. isn’t it
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单项选择题
They can’t drive a car. （）can I.

A. Nor
B. So
C. But
D. and
单项选择题
They arrived at a farmhouse, in front of （）sat a small boy.

A. whom
B. who
C. which
D. that
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