You don't text back as fast as you ____,do you?Sorry,I am quite busy these daysA sued up B used to C using to D using up
问题描述：
You don't text back as fast as you ____,do you?
Sorry,I am quite busy these days
A sued up B used to C using to D using up
答
选B. used to
意思：
--你不像原来那么快回短信了，对吗？
--抱歉，我这些天很忙。
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答
B
你没有像你以前那样迅速回复信息,是吗?
use to 过去常常