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單項(xiàng)選擇題

The boy（）to school already.

A.has taken
B.has been taking
C.is taken
D.has been taken

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單項(xiàng)選擇題

It's not safe（）in the street.

A.played
B.play
C.playing
D.plays

單項(xiàng)選擇題

He carried on（）after his accident.

A.to work
B.work
C.working
D.worked