The teacher gave us so difficult a problem we couldn't solve. The teacher gave us so difficult a problem we couldn't solve it. A. as B. that C. which D. the ones 【查看更多】
题目列表(包括答案和解析)
The teacher gave us so difficult a problem _____ we couldn't solve. The teacher gave us so difficult a problem _____ we couldn't solve it.
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A. as, that B. that, as C. which, that D. the ones, which
