题目内容

No light ____ in the house for the past two evenings, one of the neighbors broke in and found the old lady in her chair.

A. being visible
B. to be visible
C. has been visible
D. having been visible

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According to a recent poll, 61 percent of American high school students have admitted to ____ on exams at least once

A. cheating
B. cheat
C. have cheated
D. being cheated

A survey was carried out on the default rate of the assembly line, ____ were surprising

A. as results
B. which the results
C. of whose the results
D. the results of which

Doing your homework is sure way to improve your test scores, and this if especially true ____ it comes to classroom tests.

A. when
B. since
C. before
D. after

You ____ all those dishes, you know. I’d have done them myself when I got home

A. wouldn’t have washed
B. couldn’t have washed
C. mustn’t have washed
D. needn’t have washed

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