题目内容
Listen, someone is knock ____ the door.
[ ]
|
A .at |
B .to |
C .for |
D .from |
答案:A
解析:
解析:
|
knock 是不及物动词,常与介词at或on连用 |
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题目内容
Listen, someone is knock ____ the door.
[ ]
|
A .at |
B .to |
C .for |
D .from |
|
knock 是不及物动词,常与介词at或on连用 |