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【单选题】

Reportedly yesterday a group of American soldiers were walking along the road in Iraq when a bomb was _____, three of whom were killed.

A.
set about
B.
set off
C.
set up
D.
set out
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参考解析:
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举一反三

【单选题】All of them have ___ smoking.

A.
give up
B.
gave up
C.
given up
D.
to giving up

【单选题】The young lady was careful _________.The young lady was careful _________.

A.
not repeating her mistake
B.
not repeated her mistake
C.
to not repeat her mistake
D.
never to repeat her mistake