问题
选择题
– What are your parents doing now?
- Well, my father is reading a newspaper_______ my mother is cooking.
A．after
B．while
C．but
D．then
答案
答案：B
while作为连词，连接时间状语从句，主句和从句的动作可以同时发生，都是用进行时。故选B
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