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單項選擇題

They（）for hours.

A.have been driving
B.have been driven
C.drove
D.drive

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單項選擇題

He has（）four successful books.

A.wrote
B.written
C.been writing

單項選擇題

We have our house（）every week by a cleaner.

A.clean
B.cleaned
C.cleaning
D.to clean

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