24. However busy you are try to at least half an hour each day to practice listening and

问题补充：

24. However busy you are, try to at least half an hour each day to practice listening and reading.

A. put away

B. put up

C. put off

D. put aside

答案：

A. put away

B. put up

C. put off

(答案→)D. put aside

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