—Did he come back late last night?
—No．It was not yet eight o'clock _____ he arrived home．
A．before B．that C．until D．when
Students are now preparing for the college entrance exam．and I hope their efforts will _____．
A．come on B．go up C．stand out D．pay off
—You just think of yourself! You kept me wailing for at least three hours．
—I' m sorry that you _____ think so．
A．would B．should C．could D．might
．John has got a fever these days, and he says he doesn’t want to see a doctor, but I’m afraid he has no _____．
A．idea B．treatment C．alternative D．chance
If you find yourself _____ no one will help you, please call me．
A．where B．when C．which D．what
．Meetings were held to update employees as soon as new information became _____．
A．flexible B．convenient C．available D．private
