The problem was too difficult to be solved还是The problem was too difficult to solve?

The problem was too difficult to be solved还是The problem was too difficult to solve?
英语人气:934 ℃时间:2020-03-21 08:43:29
优质解答
用后面的.be 动词后面的形容词如果是easy/difficult等的话,动词不定式只要用主动的.
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