Edison asked his father why the hens could hatch eggs ___he couldn’t.
A.as
B.and
C.when
D.while
答案:D
连词辨析。As因为,随着;and和,并且;when既然,当……时;while然而,当……时候。句意:爱迪生问他的父亲为什么母鸡能孵蛋而他不能。故选D。
Edison asked his father why the hens could hatch eggs ___he couldn’t.
A.as
B.and
C.when
D.while
答案:D
连词辨析。As因为,随着;and和,并且;when既然,当……时;while然而,当……时候。句意:爱迪生问他的父亲为什么母鸡能孵蛋而他不能。故选D。