If (keep) ______ in humid condition, the milk can’t remain fresh for three days

游客2024-07-02 12

问题 If (keep) ______ in humid condition, the milk can’t remain fresh for three days.

选项

答案 kept

解析过去分词表示被动意义。参见模拟测试五第l?题的注释。

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If(keep)______inhumidcondition,themilkcan’tremainfreshforthreedays