单项选择题
Never get off the bus（）it has stopped.
A.if B.as soon as C.until D.or
单项选择题 Never before（）see such a terrible car accident on the road!
单项选择题 Neither John（）his father was able to wake up early enough to catch the morning train
单项选择题 Nancy is considered to be（）the other students in her class.
