His parents died when he was young, so he had to .
The exhibition _____ such endangered animals as the giant panda and the Siberian tiger and describes the work being done to protect them.
The severe competition in the job market has eventually ____ many students to the idea that knowledge plus ability is the only way out.
Many education experts stressed in the meeting that scores should not be viewed as the only ____ of success in one's study.
If a friend snaps at you or is unfriendly, step back, and with a sense of compassion, try to experience life from his____.
The way he acted towards people was to keep on good terms with them ______ principle, which was usually thought little of. A. at the mercy of B. at the risk of C at the expense of D. at the bottom of