問題詳情
21. Don’t forget to wash your hands before meals, ____ you mayeat something dirty.
(A) so
(B) and
(C) but
(D) or
(A) so
(B) and
(C) but
(D) or
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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