單項選擇題They set()to look for the lost child.

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


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1.單項選擇題Our food soon ran()

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

2.單項選擇題Biting your nails is()habit.

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

3.單項選擇題We are()how an error like this could have happened.

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

4.單項選擇題After two()delay, our train arrived at last.

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

5.單項選擇題The football match was called()because of the snow

A.off
B.up
C.for
D.in