31．In summer, food will go bad ifin room temperature.A. leavingB. leftC. being leftD. havi

发布时间：2020-08-15 03:02:31


31．In summer, food will go bad if    in room temperature.
A. leaving
B. left
C. being left
D. having left

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A. leaving
(答案→)B. left
C. being left
D. having left
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