C
it 指代to 后面的内容,一般这样主语提前的句子都是用it来替代那个主干的,
英语单选：（）seem very hard to work out this problem AThat B This
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相关问题
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____ seems very hard to work out this problem.
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( ) seems very hard to work out this problem.AIt B That C Th
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1.______ seems very hard to work out the problem.
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It is ______ to work out this problem.
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This is very easy to work out the math problem.有什么错?
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一道简单英语单选题You though of a mean to work out this problem."of"后
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连词成句 work,very,difficult,to,seems,the,problem,maths,to,out,
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To work out the problem is very hard .(同一句) _____ is very __
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work out 的同义词例：work out this problems 的同义短语-- -- -- this pro
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初三英语单选They（ ）work very hard when they were young.a.had to b.