Linda was______ the experiment a month ago, but she changed her mind at the last minute.

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问题 Linda was______ the experiment a month ago, but she changed her mind at the last minute.

选项 A、to start
B、to have started
C、to be starting
D、to have been starting

答案B

解析不定式作主语补足语。英语中通常对“it is believed that…”做如下转换：It isbelieved that he is…=He is believed to be…。故B为答案。

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专业英语四级

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