( ) 15. The richer countries always raise the prices of their imports.

36. What does the underlined word “these” in Paragraph 2 refer to?

（  ）52. In response to an economic crisis, it is advisable to take risks.

24. ____ five minutes earlier, you could have seen them off.

Section BDirections: This section is to test your ability to understand short conversation. There are 2 recorded conversations in it. After each conversation, there are some recorded questions. Both the conversations and questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.Conversation 16.

22. Not until he retired from teaching three years ago ____ having a holiday abroad.

61. 真正的友谊就像健康一样，失去了才觉得宝贵。

26. You might keep those old jam bottles. You never know ___ you might need them.

43. Choose the right time order of the following events.a. The first Father’s Day was observed.b. Mother’s Day was proclaimed a day for national observance.c. Father’s Day became a day for national observance.d. The idea of honoring fathers was brought up.

32. You have been working on this morning. It‘s time you ____ .

19. Only when your identity has been checked ____.

23. The letter is from my sister, ____ is working in Beijing.