Experts warn that medical waste from hospitals, if properly, may contribute to spreading diseases．
A．not handledB．not being handled
C．not to be handledD．not having been handled
—Why so early? The movie doesn't start till seven．
—I don't want to be at the traffic there．It's terrible during the rush hour．
A．have you left B．do you leave C．would you leave D．are you leaving
If it the climate, I would stay here much longer．
A．is not forB．had not been for C．were not for D．would not be for
Sinking in the cheers of people, David walked off the stage, tears dropping he could stop them．
A．after B．when C．until D．before
Days of snowstorms have left the city under thick layers of ice and some 50,000 homes without power．
A．to be trapped B．trapped C．having trappedD．being trapped
Heavy smog blankets Beijing． ,city authorities start using its new smog warning system．
A．In turn B．In time C． In response D． In return
