A number of people were reported to__in a series of explosions .
A number of people were reported to__in a series of explosions on London's transport system on Thursday morning.
A.had been killed
B.have been killed
why we choose
人气:293 ℃ 时间:2019-10-19 17:49:05
解答
to 动词不定式后加动词原型
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