题目内容

The workers were made ____ from morning to night in the past.

A. worked
B. to work
C. work
D. working

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-Jack hasn't taken his piano lessons for a long time.-He is considering _________ his piano course and spending more time on his study.

A. to drop
B. to throw
C. dropping
D. throwing

I remember ______ to Beijing when I was a child.

A. to take
B. taking
C. to be taken
D. being taken

We only planned ______ the play for an hour, but in the end, we stayed for three hours.

A. watch
B. watches
C. to watch
D. watched

磨料磨损的机理包括（）

A. 微量切削
B. 疲劳破坏
C. 压痕破坏
D. 断裂