If ______ in the fridge, the fruit can remain fresh for more than a week.

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问题 If ______ in the fridge, the fruit can remain fresh for more than a week.

选项 A、kept
B、keeping
C、be kept
D、to keep

答案A

解析 该句为省略句,相当于一个条件状语从句if it is kept in the fridge。再如:If heated, water can be turned into steam.(水如果被加热,会变成水蒸气。)
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