Bob's doctor suggests _____ for a few days .
| A．that he is resting | B．that he has to rest |
| C．him to rest | D．that he rest |
It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.
| A．what | B．that | C．how | D．whether |
The English in the future will be quite different from the English of today. It is possible that some English words may even ________ completely.
| A．die down | B．die out | C．die off | D．die of |
Rainforests __________ and burned at such a speed that they will disappear from the earth in the near future.
| A．cut | B．are cut | C．are being cut | D．had been cut |
_______ the rain falling so hard, it becomes more and more difficult to carry on the rescue work.
| A．Since | B．As | C．With | D．For |
At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents.
| A．turning to | B．watching over | C．watching out | D．digging out |