单项选择题

It was ______ computer games that took the boy a lot of time that he ought to have spent on his lessons.

A．to have played
B．playing
C．played
D．having played
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单项选择题
Little ______ at that time that the course of my life was about to change.
A．did I know
B．I knew
C．I didn't know
D．have I known
单项选择题
Spending the summer traveling round Australia is a great idea, but it begs the ______ of how we can afford it.
A．mercy
B．pleasure
C．question
D．permission
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