問題詳情
21. Mary wants to go hiking in the mountain this Saturday. She needs to make sure _______the weather will be fine.
(A) how
(B) what
(C) why
(D) whether
(A) how
(B) what
(C) why
(D) whether
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增
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