把下面的一段话改成被动语态four powerful bombs hir central london during t

把下面的一段话改成被动语态
four powerful bombs hir central london during this morning's rush hour.three exploded on london underground lines and another on a bus.
no one has yet discovered who is responsible for the incidents but police are already collecting evidence.they hope that they can find an explanation for the attacks.
急·`!
皖ss公 1年前 已收到1个回答 举报

apple00p 幼苗

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每个小分句都要改成被动?
central london was hit by four powerful bombs during this.london underground lines was exploded by three and a bus was by another.(这一小分句我不是很确定改的对不对)
It is not yet discovered who is .but evidence is already being collected by the police.They hope that an explanation can be found for the attacks.

1年前

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