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do you think___ important to keep our environment clean?A、it B、that C、this D、one 应该选哪个
人气:277 ℃ 时间:2019-11-24 01:42:20
解答
A
do you think是插入语
It is important to keep our environment clean.
[it 作先行代词,引导作为逻辑主语或宾语的从句]:
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