题目内容
17.Food cannotbe kept (keep) properly in a fridge at an unsuitable temperature.分析 在不适宜的温度下,食物不能被保存在冰箱里.
解答 答案:be kept.情态动词的被动语态的构成:情态动词+be+过去分词;根据空格前面的情态动词can,所以后面要用动词原形,另外食品是被保存的,主语food是谓语动词keep的动作承受者,所以要用含有情态动词的被动语态,故填be kept.
点评 首先要掌握情态动词的被动语态,然后结合句子的意思以及英语提示,就可以确定正确答案.
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