16. There was little time left, so we had to r                 to school together.

17. I live in the center of the city. It is c                 for me to go shopping.

18. You are a good boy and you should speak to the old people p                .

19. I want to send Jim a letter. But I don't know his a                .

20. Look, the expression on his face s                 that something bad must have happened to him.

21. --- Which d                 does your house face?

--- It faces south.

22. There is a mistake in the notebook; you should c                 it.

23. P                 me, but what's your address?

24. We think it's i                 to speak loudly to your parents.

25. There's an u                 Dinosaur World in the museum.

26. I saw some students r                 out of the classroom after class.

27. Shopping online is c                 because you needn't go out.

28. When foreigners ask you the way, we'd better tell them about it p                .

29. We can't find her because we don't know her a                .

30. The English program can s                 ways for us to take an interest in learning English.

31. John sits                 (在旁边) David in class.

32. I live near the supermarket, so it's very                 (方便的) to go shopping.

33. Could you please help me to                 (改正) my mistakes?

34. People think it is                 (无礼) to talk loudly in public places.

35. Henry, could you tell me your e-mail                 (地址)?

36. Haikou is the                 (中心) city of Hainan Province.

37. You can find a library on the                 (角落) of Main and Center Streets.

38. You can park your car in the  &n