In my opinion，keeping dogs should not be banned，but________to certain areas.
| A．limited | B．limiting |
| C．to limit | D．to be limited |
______ the aids from the outside, the positive attitude of the disaster-stricken people _____ the key role in the reconstruction of their destroyed towns and villages.
| A．Except for; plays | B．Besides; play | C．Apart from; plays | D．Except; play |
It has been announced by our provincial government that another two medical teams will be sent to ______ the injured people in the severe earthquake.
| A．join to | B．join in | C．take part in | D．attend |
Samples of blood from Cholera infected patients have been sent to the blood center _______.
| A．to be checked | B．to be examined | C．to test | D．being tested |
After several years of observation, the research group ______ the conclusion that language acquisition is faster when students ______ to the situation where it is spoken.
| A．has come to; expose | B．have arrived at; are exposed |
| C．has concluded; are exposed | D．have reached; expose |
It will be many years ______the doctors and medical scientists can find _____ for cancer.
| A．since; cures | B．when; treatments | C．before; cures | D．until; treatments |