— does he take these pills? —Three times...

— does he take these pills? —Three times a day.

A．How long B．How often C．How many

B 【解析】试题分析：句意： ——这些药片他多长时间吃一次？——一天三次。A．How long多长时间或者东西多长；B．How often 多久一次，提问频度副词；C．How many多少，提问可数名词的复数。根据语意故答案选B。考点：考查短语。

考点分析：

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