2. 外语
  3. A convenient way is to set the food on a piece of aluminum oil, ______to the air for half an hour, and then cover it with a dish

A convenient way is to set the food on a piece of aluminum oil, ______to the air for half an hour, and then cover it with a dish

admin2009-02-10  39
问题 A convenient way is to set the food on a piece of aluminum oil, ______to the air for half an hour, and then cover it with a dish.
选项 A、let it stay open
B、let it stay opened
C、letting it stay open
D、letting it stay opened
答案C
解析 分词做伴随情况状语，形容词open在短语中做补语，表示状态，不用过去分词。所以D不正确。
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