To get a better view of the stage, ____________________.
A．our seats had to be changed.
B．our seats were changed
C．our seats are changed
D．we had to change our seats.
We should do more such exercises in the future，I think，_____ those we did yesterday.
A．as B．like C．about D．than
Has it been warned that all the children in this area stay at their homes until the Flu has been controlled ?
A．can B．will C．may D．shall
_________ smoking, he would not have got cancer in the lung.
A．Was he given up B．Had he given up
C．Did he give D．If he gave up
---“What do you think of the service here?”
---“Oh, _________ . We couldn’t have found a better place.”
A．too bad B．sorry C．wonderful D．impossible
Modern forms of transportation and communication have done much to ______ the isolation（隔离）of life in Alaska.
A．break down B．break out
C．break into D．break through
