Bob said he was going to join our club but he didn’t. What a shame! He ______ his mind.
| A．can’t have changed | B．mustn’t have changed |
| C．wouldn’t have changed | D．shouldn’t have changed |
The teacher explained the question clearly to impress his students ________ its importance.
| A．with | B．at | C．in | D．On |
It was a really ___________ experience. Afterwards everybody was very ___________.
| A．terrifying; shocking | B．terrified; shocking |
| C．terrified; shocked | D．terrifying; shocked |
With so much noise of the traffic，I couldn’t________ my research work.
| A．put down | B．settle down |
| C．settle down to | D．take down |
Word came _________the first patient who had been infected with A(H1N1) flu was cured.
| A．that | B．when | C．which | D．Whether |
—Everybody knows smoking is harmful to health，but still so many people smoke.
—Exactly! So our country is planning to start a ________ against smoking.
| A．war | B．campaign | C．welfare | D．organization |