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 本题考查句子时态。was to do sth. 表示过去将来要做某事,was to have done表示本应做的事情却没做,根据语义,答案为B项。
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