一Why didn’t you try your best to get on the bus?

一I tried to，but   I could，it started moving．

A．when

B．after

C．until

D．before

胆道蛔虫病( )。

A．阵发性绞痛
B．持续性胀痛
C．持续性绞痛
D．阵发性钻顶样痛
E．刀割样腹痛