___you___out the problem ,sam?
题目
___you___out the problem ,sam?
not ,yet but I'm going to
a.did,work b.are,working c.have,worked d.will work
答案
have you worked out the problem ,sam?
not ,yet but I'm going to
a.did,work b.are,working c.have,worked d.will work
我是从事英语 的,不明可问.
举一反三
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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