以下试题来自:专升本英语题库

单项选择题They set()to look for the lost child.

A.up
B.down
C.about
D.off

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1Our food soon ran()

A.away
B.over
C.out
D.up

2Biting your nails is()habit.

A.an irritated
B.an irritating
C.irritating
D.irritated

3We are()how an error like this could have happened.

A.searching
B.researching
C.surveying
D.investigating

4After two()delay, our train arrived at last.

A.hours frustrating
B.hours frustrated
C.hours’ frustrating
D.hours’f rustrated