--Moreandmorepeoplethink__necessarytoletthestudentsteachthemselves.--

发布时间：2020-08-13 18:54:43

--More and more people think __ necessary to let the students teach themselves. -- That’s true. They can improve themselves in this wayA.it hasB.itC.that

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B解析think的真正宾语是to let the students teach themselves，所以用it作形式宾语。选B。
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