如果选B的话
从句应该是no one can work it out.
本句是such...as句型
9. It is such a difficult problem _______ no one can work out.
9. It is such a difficult problem _______ no one can work out.
A. asB. thatC. soD. thAT
答案怎么是A,应该B把
A. asB. thatC. soD. thAT
答案怎么是A,应该B把
英语人气：830 ℃时间：2019-11-02 12:49:41
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