单项选择题

In middle school, I became more ________ with my appearance.

A.concern
B.concerning
C.concerned
D.concerns
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________ Christmas Eve, it is said that Father Christmas brings presents but only to good children.
A.on
B.at
C.over
D.in
单项选择题
Mr.Johnson keeps fit by eating less fat and sugar and ______ more exercise.
A.takes
B.take
C.to
B.taking
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