i have cleaned the door twice(对画线部分提问 划线部分:twice)
题目
i have cleaned the door twice(对画线部分提问 划线部分:twice)
_____ ______ _____ you _______the door?
答案
How often have ...cleaned.
前面如果是四个空(这个比较好)
How many times have ...cleaned
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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