-_______ can the batteries (電池) 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】

試題分析：句意：--蘋果手機和蘋果平板電腦保持工作，它們的電池能工作多長時間？--大約十個小時。分析選項：how much多少（對不可數(shù)名詞的數(shù)量進(jìn)行提問）；how many多少(對可數(shù)名詞的數(shù)量進(jìn)行提問); how long多長時間（對時間的長度進(jìn)行提問）；how often多久一次（對時間頻率進(jìn)行提問）。聯(lián)系答語對時間的長度進(jìn)行提問，因此選用疑問詞how long.故選 C

考點：考查疑問詞的用法。

 

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