阅读下面短文，按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空。

Nowadays, people are talking about the expansion of college enrollment. This new policy___16___(adopt) by the government benefits a lot of high school graduates and therefore the country as well. There ___17___ (use) to be such a fierce competition among high school graduates to enter college___18__many of them studied too hard only to spoil their health. Even some of them killed___19___only because they failed in the entrance exams. Now they will have more chances to attend college and the country is also going to benefit   20   it. There will be more well-educated and highly qualified citizens and professionals, ___21___ is essential to the development of the country.

  22  , now some students who otherwise can’t enter a college are not studying hard enough. They think now since colleges enroll more students, they are more  23  (like) to be admitted into one of them even without a high score.

24  (doubt), although there is still room for improvement to this policy, I think it is still a good one which brings more good   25  harm to the students and the nation. It should be still carried out.

关于固有口腔内结构描述正确的为（）。

A、含硬腭、软腭

B、硬腭上的切牙 * * 和腭大凹是麻醉的进针标志点

C、切牙 * * 深面有切牙孔，鼻腭神经穿出，支配前牙腭部的粘膜

D、腭大凹深面有腭大孔，前腭神经穿出，支配后牙腭部的粘膜

E、以上都对