Scientists _______ a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.
| A．carried on | B．carried out | C．carried away | D．carried off |
____about the experience in the tourist attraction, he feels very excited and with it.
| A．To talk | B．On talking | C．By talking | D．Talk |
It is well known that ____ the flower is to grow,____the price is in the market.
| A．harder; higher | B．the harder; the higher |
| C．the more hard ; the more high | D．more harder ; more high |
You have done a good job in the competition. But you’d better ____your body language next time.
| A．to pay little attention to | B．pay many attentions to |
| C．to pay few attention to | D．pay more attention to |
—I’m going to play soccer now.
—________. It’s raining heavily outside.
| A．Good idea | B．It’s up to you | C．You’d better not | D．I have no idea |
Since I knew how hard the life they lead is, I have understood ____ they need so much money.
| A．how | B．why | C．whether | D．when |