In order to finish the research, the professor always _______, for every day the light in hisroom didn’t go out until 4 a.m.
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A
mixed up
B
cleaned up
C
turned up
D
stayed up
推荐题目
Don’t all stand up together! ________, please.
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A
Each at one time
B
One at a time
C
One by one time
D
One for each time
The fresh air _____ our health and we _____ it.
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A
benefits to; benefit
B
benefits; benefit from
C
benefits from; benefit
D
benefits; are benefited by
It was the largest experiment we had ever had; it _____ six hours.
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A
ended
B
finished
C
prolonged
D
lasted