In face of danger, we need to stay _______. Only in this way can we come up with good solutions.
| A．still | B．quiet | C．calm | D．silent |
Mobile phones __________ in China are well worth trusting for many reasons.
| A．produce |
| B．producing |
| C．have been produced |
| D．produced |
In the last few years thousands of films __________ all over the world.
| A．have produced |
| B．have been produced |
| C．are producing |
| D．are being produced |
Sam___________ some knowledge of the computer just by watching others working on it.
| A．brought up |
| B．looked up |
| C．picked up |
| D．set up |
Armed with the information you have gathered, you can __________ preparing your business plan.
| A．set out |
| B．set about |
| C．set off |
| D．set up |
The club,__________25 years ago, is holding a party for past and present members.
| A．founded |
| B．founding |
| C．being founded |
| D．to be founded |