It is true that at times the U.S.A. has experienced periods of _______ unemployment as well as labor shortages.
A. available                         B. acute
C. accessible                      D. ashamed

Lily was talking to our teacher about examination, when suddenly Tom _______.

While I_________that he is an excellent leader,I don’t think he can do a good job in this company because he is too careless.

The two Chinese scientists have made a wonderful discovery, which marks a major _______ in the basic research in the field.

The incident caused a hot discussion on the Internet, but the local government had no immediate _______ on it.

In the centre of Zi Yang park sit three life-size plaster(石膏)________, Zhu Xi included.

We were scared to death when the fire _____. Fortunately, it was put out before it caused much damage.

We do have trained people, but the problem is how to organize them, and ____their enthusiasm.

The accident caused some _____ to my car, but it’s nothing serious.

Taking this medicine, if ________, will certainly do damage to your health, as the doctor advises.