23．We still remember once__________round the famous tower when we were young.

30.  While shopping, people sometimes can’t help_____into buying something they don’t really need.

29．With Aunt Ma __________ good care of, we felt quite _____________.

26．All passengers _________ to Shanxi must change trains at the next stop.

19. It’s dangerous to have the fire _______ at home all night long.

10. In our school, the students are not allowed, unless they have special passes, ____ after 11pm.

7. The manager meant ____ the workers that being 5 minutes late meant ____ the company.

5. China is a ______ country ______ to the third world.

37. I tried all I could do ______ the topic at the meeting, but failed.

35. I like getting up very early in summer. The morning air is so good _______.