题目内容

It's great that all the visitors who on the island were saved.

A. trapped
B. have been trapped
C. had trapped
D. had been trapped

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A rescue worker risked his life saving two tourists who ________ in the mountains for two days.

A. are trapping
B. have been trapped
C. were trapping
D. had been trapped

The classroom ________ by students every day.

A. cleans
B. cleaned
C. is cleaned
D. is cleaning

It was the natural disaster, rather than human errors, that ________ for the death of so many innocent people.

A. are blamed
B. was to blame
C. was blamed
D. were to blame

Please don’t stand up in class until you ______.

A. were told to
B. are told
C. are told to
D. were told

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