52单词网 > 高中英语 > 高中英语题库 > several times, the young scientist still kept on making his experiment.A.Having

several times, the young scientist still kept on making his experiment.A.Having

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several times, the young scientist still kept on making his experiment.A.Having

________several times, the young scientist still kept on making his experiment.

A.Having been failed

B.Having failed

C.Though failed

D.Because of failure

试题答案

B

标签：keptstillonhismaking

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