How often have you been in Greener China?__________ 改错
题目
How often have you been in Greener China?__________ 改错
答案
How often have you been in Greener China?_ 改错
改为:How long have you been in Greener China
解析:how long 表时间的长度; how often 表频率
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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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