I know one of the things I was unsure about was _____ hard it would be to climb this mountain.
A.what | B.that | C.however | D.how |
相关知识点
推荐试卷
I know one of the things I was unsure about was _____ hard it would be to climb this mountain.
A.what | B.that | C.however | D.how |
试题篮
()