单项选择题
A. He is going to be arrested. B. He is accused of damaging books. C. He has lost some valuable books. D. He did not return books on time.
A. The average published price for them was about 7000 dollars. B. They need to pay only a little more than local students. C. The total sum for them may be nearly 30,000 dollars on average. D. They can receive better education than local students.
A. for explaining how to exploit the deep-see mining minerals B. by many countries on exploiting the deep ocean C. partly for solving the argument about mining minerals D. to divide the ownership of developing mining minerals