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Itwasin2,000,hewasworkingattheresearchcenter,hemadethescientificdiscovery.A.when,whenB.that,whereC.which,whenD.when,that

题目详情
It was in 2,000,he was working at the research center,he made thescientific discovery.
A.when,when B.that,where C.which,when D.when,that
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答案和解析
B,前面是强调句型中的that,后面where做the research center地点状语的先行词