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單項選擇題

Don't（）on the past --- try to be more positive.

A.think
B.startle
C.dwell
D.live

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Private employment agencies may not have your best interest（）heart.

A.by
B.at
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He has been（）from the swimming race because he did not win any of the practice races.

A.reduced
B.deleted
C.eliminated
D.diminished