25．—Why not open the windows to let_____cool air in?
—I'd rather you didn't_____air in our town is terribly polluted．
A．a；The B／；The C．/；/ D．the：/
－Have you got any particular plans for the coming winter vacation?
－Yes, _, I'm going to visit my grandparents．
| A．if necessary | B．if so | C．if ever | D．if possible |
Nowadays signs prohibiting smokinga common sight in restaurants, tea houses and shopping malls．
| A．are | B．is | C．were | D．was |
In the less than two months since the reality television show—"Where Are We Going , Dad?" first aired, the showto the top of Chinese television ratings．
| A．had climbed | B．has climbed | C．climbed | D．was climbing |
A man set off a bomb at a Russian train station on Sunday,at least 16 people in the deadly attack．
| A．killed | B．kill | C．to kill | D．killing |
－Going to the party on Saturday?
－Shall we go together?
| A．Not sure． | B．Guess what? | C．With pleasure． | D．You bet ! |