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

 

C

【解析】

试题分析：句意：--苹果手机和苹果平板电脑保持工作，它们的电池能工作多长时间？--大约十个小时。分析选项：how much多少（对不可数名词的数量进行提问）；how many多少(对可数名词的数量进行提问); how long多长时间（对时间的长度进行提问）；how often多久一次（对时间频率进行提问）。联系答语对时间的长度进行提问，因此选用疑问词how long.故选 C

考点：考查疑问词的用法。

 

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