1．According to the theory (理论)of relativity，nothing can travel faster than light.
2．He often says that he doesn't believe in any religion(宗教)and only believes in himself.
3．Those anxious for reform say that the present system(体制)is too narrow.
4．Some experts think reading is the fundamental (基本的) skill upon which school education depends.
5．A truck went out of control and crashed (碰撞)into the back of a bus.
6．He found something floating (漂浮)on the lake，which frightened him.
7．If you multiply(乘)two and three，you will get six.
8．Accustomed to the climate (气候)in the countryside，the old couple prefer not to move to the city.
