单项选择题

John and Sue () computer games for hours before their parents came home from work.

A.are playing
B.have been playing
C.played
D.had been playing

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单项选择题
The driver was () for the traffic accident.

A.not blame
B.not to be blamed
C.not to blame
D.not to be blame
单项选择题
Tony couldn't go to university but () his education through evening school courses.

A.continue
B.continued
C.continues
D.to continue
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