The government has taken some measures to solve the shortage of electricity, but it may be some time _________ the situation improves.
| A．since | B．when | C．unless | D．before |
-- Who do you think _____ such a foolish thing?
-- It _____ Tom, but I’m not sure.
| A．could have done; may have been | B．could have done; must have been |
| C．should have done; may be | D．must have done; might have been |
-- Mr Jordan, we want to hear your opinion about the current NBA games．
-- OK, I ____ to that.
| A．came | B．have come | C．am coming | D．come |
The firemen _______ some nearby houses to stop the fire spreading．
| A．cut down | B．turned down | C．put down | D．pulled down |
______ the fact that the old cars could not go as fast as modern ones, people still watched the race with a great deal of pleasure and excitement.
| A．Despite | B．Thanks to | C．As far as | D．Although |
The university estimates that living expenses for international students ______ around $8,450 a year, which ____ a burden for some of them.
A are；are B. is；are C. is；is D. are；is