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

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单项选择题

You know （）about it than Tom does．

A.even little
B.even less
C.more little
D.more less

单项选择题

The factory was closed down as a （）of the terribly bad management．

A.matter
B.consequence
C.whole
D.rule