单选题：The haze or smog was so serious that the winter running ____..

题目分类：情态动词
题目类型：单选题
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The haze or smog was so serious that the winter running _________.Some students complained as they ranA．could have cancelledB．should have cancelledC．must have been cancelledD．ought to have been cancelled

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_ you have finished your report, you can have it _...

_____ you have finished your report, you can have it _____.A. Now for; printing B. Now that; printedC. So far; been printed D. So that; being printed

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It ________be the vocabulary that caused you the problem in ..

It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words. A．may B．couldn’tC．shouldD．needn’t

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"Look at him! He behaved _____ nothing had happened", said..

"Look at him! He behaved _____ nothing had happened", said Mary.A. as if B. even ifC. if D. unless

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Don't use water to put out the fire if oil catches fire. ..

Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.A．shallB．mustC．mayD．will

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The medicine works more effectively _____you drink some hot ..

The medicine works more effectively _____you drink some hot water after taking it.A. as B. until C. although D. if

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