题目内容
用所给动词的适当形式填空
Listen ! Some one ________ ________ at the door. (knock)
答案:
解析:
解析:
|
is,knocking |
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题目内容
用所给动词的适当形式填空
Listen ! Some one ________ ________ at the door. (knock)
|
is,knocking |