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草坪减震软垫:单项填空
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查人人中国名人网
时间:2024/06/01 07:22:26
It was in the lab ( ) was taken charge of by Professor Black ( )
they did the experiment.
a that where b which that c when that d which where
A that 强调、where做地点状语从句.
A,it was......that.......是强调句.
a
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