综合类
单选题Before fridges came into use，it was still possible for people to have fresh foods because__________．
参考答案：A进入在线模考
空格所在句子的基本时态(主句时态)是一般过去时，所以空格所在的结构(从句结构)应该是过去时态的一种，所以只有A，D，F可能是答案。从搭配语意(在冰箱开始使用之前，因为牛奶，肉，蔬菜等食物都会送上门，所以人们仍然可能获得新鲜的食物。)上看，最合适。
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3If you stop using the fridge，at least you won’t be troubled by the noise__________．
A．milk，meat，vegetables，etwere delivered
B．it has promoted the sales of many kinds of commodities
C．foods can be preserved
D．most kids like iced soft drinks
E．every housewife needs food
F．the fridge produced when it is working
