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题文

“We ______ other possibilities too, such as murder. We ______ until we find convincing evidence.”said Detective Sam Peterson.
A. had looked at; wouldn’t give up      B have looked at; don’t give up
C have considered; haven’t given up     D. have been looking at; won’t give up

科目 英语   题型 单选题   难度 较易
知识点: 动词语态
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