He has been the computer for two hours, chatting with a boy from Australia.
A. in B. on C. at D. by
The education of young is always hot and serious topic.
A. the, the B. the, a C. a，the D. a, a
According to IQ scores, you are smartest from 18 t0 25, but you're wiser and more experienced _______ increasing age.
A. for B. with C. at D. of
A1l flights _________ because of the heavy storm, so we decided to take the train.
A. have canceled B. have been canceled
C. had canceled D. had been canceled
Though ______in a big city, Peter always prefers to paint the beautiful scenes of country life.
A. raised B. was raised C. raising D. raises
Please give Jim the schedule for tomorrow's conference when he _______ back. He is to chairthe conference.
A. will come B. came C. comes D. is coming
