I know one of the things _____I was unsure about was _____ hard it would be to climb this mountain. ...
2022-12-07 15:27:49 164次 2014届江西南昌第二中学高三第一次月考英语卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
I know one of the things _____I was unsure about was
_____ hard it would be to climb this mountain.
A. that; how B.
what; how C.
which; what D. /; what
本题链接：
