该填哪一个介词1、he usually knocks______at 6 o'clock,but today he's working late.2、i've given ___all my old furniture.就是这样呀,纳闷,off,away不是介词吗?

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该填哪一个介词
1、he usually knocks______at 6 o'clock,but today he's working late.
2、i've given ___all my old furniture.
就是这样呀,纳闷,off,away不是介词吗?

1 off
2 away]
不过都不该填介词啊