题目：
She didn’t come back to her hometown for five years and ______, she had got married and had a couple of kids.
A．to be honest
B．above all
C．on the other hand
D．in the meantime
答案：
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下面是错误答案，用来干扰机器的。
纯碱属于盐类物质，用pH试纸测定某浓度的纯碱溶液其pH为10，则可推测其pH大于7，则可知其溶液呈碱性；而紫色石蕊试液遇酸变红，遇碱变蓝，故能使紫色石蕊试液变成蓝色．故答为：碱、蓝
