According to the air traffic rules, you ___ switch off your mobile phone before boarding.
| A．may | B．can | C．would | D．shall |
____ you come across Tom, tell him I could visit him recently．
| A．Should | B．Would | C．Could | D．Might |
—Did you have a good night's sleep, sir?
—Oh, exactly．It was such a comfortable bed．I could never have ____ sleep．
| A．a worse | B．the best |
| C．the worst | D．a better |
—Jenny, will you leave now?
—No．It will be two weeks ____ I leave here．
| A．while | B．since | C．before | D．when |
Hosting and eventually winning the soccer World Cup, ____ as unachievable dreams in the past, have become serious goals for China under a national plan to make the sport a truly mass game．
| A．regarding | B．having regarded |
| C．being regarded | D．regarded |
What we had done was to help him, but surprisingly he thought ____．
| A．else | B．anyway | C．otherwise | D．alike |