题目内容
The killer insisted that she was defending herself when _______.
| A．attack | B．attacked | C．to attack | D．having attacked |
B
解析试题分析：考查非谓语。句意：杀人者坚持说当他被袭击的时候他是正当防卫。When是连词，连词后要么+ doing，表主动关系，要么+ done，表被动关系，本题中主语she 和attack袭击之间是被动关系，所以B正确。
考点：考查非谓语。
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| A．paying | B．to be paid | C．having paid | D．being paid |
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| A．speaking | B．having spoken | C．to speak | D．to have spoken |
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| A．that; to eat | B．whether; to be eaten |
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