Linda was______the experiment a month ago but she changed her mind at the last minute. (2

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Linda was______the experiment a month ago, but she changed her mind at the last minute. (2007年考试真题)

A.to start

B.to have started

C.to be starting

D.to have been starting

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热搜:关于氨基酸代谢错误的论述是_________。