Health problems are closely connected with bad eating habits and a _____ of exercise.

A. amount
B. lack
C. need
D. number
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科目：高中英語 來源：0103 期中題 題型：單選題

Health problems are closely connected with bad eating habits and a _____ of exercise.
[     ]
A. amount
B. lack
C. need
D. number

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