你想选that吧?
选that的话,work out的后面要加一个it的
这里选as是引导定语从句的
Last term our maths teacher set so difficult an examination problem ( )none of us work out.A that B
Last term our maths teacher set so difficult an examination problem ( )none of us work out.A that B
Last term our maths teacher set so difficult an examination problem ( )none of us work out.
A that B as C so that D which
答案为什么是AS呢,怎么也不理解
Last term our maths teacher set so difficult an examination problem ( )none of us work out.
A that B as C so that D which
答案为什么是AS呢,怎么也不理解
英语人气：322 ℃时间：2019-08-20 05:45:20
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