-_______ can the batteries (电池) keep these cool iPhones and iPads working? - For about ten hours. A....
2022-11-13 17:25:12 203次 【全国百强校】上海市2017届九年级下学期第三周周测英语试卷（无听力部分） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
-_______ can the batteries (电池) keep these cool iPhones and iPads working?
- For about ten hours.
A. How much B. How many
C. How long D. How often
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