Experts have been warning___of the health risks caused by passive smoking.
| A．at a time | B．at one time |
| C．for some time | D．for the time |
They held a meeting ____ they could hear everyone’s idea.
| A．even if | B．now that | C．in case | D．so that |
Lily’s mobile phone was left in a taxi accidentally, _____ again.
| A．never to find | B．to never be found |
| C．to never find | D．never to be found |
— Can Li Ping help me with my English?
— I regret to tell you her English is ____ yours.
| A．as good as | B．no better than | C．no more than | D．as much as |
Music can be enjoyable, but ____ can be appreciated unless you like it.
| A．everything | B．anything | C．nothing | D．something |
The motorbike _____ start, no matter how hard he tried.
| A．shouldn’t | B．couldn’t | C．wouldn’t | D．mightn’t |