____there is a snowstorm or some other bad weather, the mail always comes on time.
题目
____there is a snowstorm or some other bad weather, the mail always comes on time.
A.because B.if C.when D.unless
答案
D
除非
希望可以帮到你,有不懂的还可以问我^^
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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