题目内容
He was in such a hurry that he almost ________ the headmaster.
A.knocked at
B.knocked into
C.knocked off
D.knocked on
答案:B
解析:
解析:
knock at敲门;knock into撞在某人身上,与某人不期而遇;knock off把……撞下来;knock on敲击,结束。
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