单项选择题

The clouds, which are formed after the eruption of the volcano, have （） the sun and now it is as dark as night.

A. blocked out
B. blocked in
C. blocked off
D. blocked up

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单项选择题
What is one man’s cloud is another man’s （）.

A. rain
B. moon
C. wind
D. sunshine
单项选择题
The meeting （）at midnight and we all went home.

A. broke through
B. stopped off
C. stopped up
D. broke up
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