单项选择题

Tom was absent today because he had to ______ his ill little brother.

A． look at
B． look after
C． look for
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单项选择题
You'd better not eat ______ food everyday.
A． much too
B． too much
C． too many
单项选择题
Miss Li is our teacher, and she teaches ______ English.
A． my
B． our
C． us
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