Little_____ about A-H1N1 so far, so there is no doubt that many people are afraid when talking about the disease.
| A．did scientist know | B．scientists have known |
| C．have scientists known | D．had scientists known |
If you _______ just wait for a moment, I’ll try to find your papers.
| A．must | B．may | C．would | D．need |
Riding a bicycle can be fun. But _______ you ride a bike to work, and then there isn’t one to ride home?
| A．how come | B．what if | C．no matter how | D．wherever |
We consider it necessary that a plan _______ before doing the work.
| A．is made | B．will be made | C．should be made | D．made |
China is the world’s largest cigarette market, _______ over 30% of the total world consumption.
| A．accounting for | B．adding up to |
| C．consisting of | D．contributing to |
We need to strike a ______ between the needs of the community and the rights of the individual.
| A．balance | B．level | C．equality | D．combination |