to understand the problem is very difficult.(用it作为形式主语)—— ——very difficult____ underst
to understand the problem is very difficult.(用it作为形式主语)—— ——very difficult____ underst
英语人气:753 ℃时间:2019-10-19 13:44:38
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to understand the problem is very difficult.(用it作为形式主语)—— ——very difficult____ understIt is very difficult to understand the problem 形式主语:It系动词:is 表语:very difficult 动词不定式...
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