单项选择题

It was（）computer games that cost the young man a lot of precious time that he should（）on his lessons．

A.to play；be spending
B.playing；spend
C.played；have spent
D.playing；have spent

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单项选择题

—What do you think of the CD？—（）.

A.good idea
B.Not at all
C.I enjoy it a lot
D.With pleasure

单项选择题

I can’t take part in the party tonight because I have to（）my little sister.

A.look for
B.look after
C.look up
D.look down upon