Question

He asked his father why he was not able to hatch chickens ______hens could.

A．however

B．while

C．as

D．although

Answer 1

B

试题分析:句意：他问他父亲他为什么不能孵小鸡而母鸡却能。A然而，不管，不论；B然而；C由于，当……时；D尽管。根据句意可知前后句内容是转折关系，故选B。