-The river near my home smells terrible now.-I found ______ diffcult to see clean rivers in our city.A.it's B.it C.that

问题描述:

-The river near my home smells terrible now.-I found ______ diffcult to see clean rivers in our city.A.it's B.it C.that D.that's

B
it 作形式主语,真正主语时不定式短语diffcult to see clean rivers in our city
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