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-_______ can the batteries (电池) keep the...

-_______ 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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