单项选择题
He must have had an accident, or he ______ then.
A. would have been here
B. had to be here
C. should be here
D. would be here
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单项选择题
The weather is not as cold (as you think). So (I don’t think) the ice is thick (enough) to (walk on it).()
A. as you think
B. I don’t think
C. enough
D. walk on it
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单项选择题
You ______ such a long essay. Mr. Smith only asked for 300 words, and you have written 900.
A. needn’t have written
B. needn’t write
C. didn’t need write
D. didn’t need to write
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