15.Please close the windows,because the traffic runs n(　　　 )outside.

14.There are four o(　　　　　 )in the world,such Pacific and Indian.

13.Please go d(　　　 )and see who it is.

12.He is a h(　　　　 )old man.He is always ready to help others.

11.She knows all kinds of knowledge ,so she is a k(　　　　　 )girl in her class.

10.He is in a hospital doing the m(　　　　　 )research all day.

9.Without your father’s p(　　　 ),you can’t play the computer games.

7.He is very s(　　　　　 )in math.He has passed the exam very easily.

6.If we work hard enough,It’s possible for us to a(　　　　 ) the object(目标).

5. You haven’t realize the i(　　　　 )of learning English.