--- _____ Tracy was in such a hurry ?

---I don’t know．She might have been running to catch the bus.

A．Why do you think

B．Why you think

C．Do you think why

D．Why not think

关于妊娠期胆囊的描述正确的是：

A．妊娠期胆囊容积明显增大

B．妊娠期胆囊容积变化不大

C．妊娠期胆囊容积明显变小

D．妊娠期胆囊壁明显变厚

E．妊娠期胆囊壁明显变薄