28.He is wearing a pair of l　　　 　trousers.

you give me some a__________on how to learn English. 1

27.We call the children between thirteen and nineteen t　　　　 .

26. we should have three meals a day，or we will s　　　　 　from the stomachache.

25.Was it an accident or did David do it on p___________？

24.We are concerned about the p____________ situation in the Middle East.

23.CCTV made a s___________ of public opinions about the poisonous milk power.

22.A___________ to Anne, a true friend is a person whom you can believe in .

21.It was raining heavily now. So I asked my children not to play o__________.

20.Sometimes he just can’t understand what I am going t_________.

19.Today people can c______________ with each other by QQ.