题目内容
I hear someone ________ at the door, please go and see who ________ is.A. knock; it
B. knocking; it
C. knocking; he
D. knock; be
答案:B
解析:
解析:
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题目内容
I hear someone ________ at the door, please go and see who ________ is.A. knock; it
B. knocking; it
C. knocking; he
D. knock; be