96. Our government has made several laws to p (掩护) teachers.
97. You'd better know a lot about their c (风尚)befo re you go abroad.
98. Mr.Wang g (结业) from Beijing Univer sity when he was 24 years old.
99. Stcven Hawk ing is one of the greatest scientists a (在世的) in the world
100. Something must be done to p ( 阻止 ) the factories from polluting the river