4.

30. Online shopping ____ over 15% of the sales volume at our partner stores.

49. Volunteers are also needed in hospitals ______ children while their parents see a doctor.

64. 你一旦养成了坏习惯，改掉它是很难的。

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. 

48. People ______ are welcome to be volunteers. 

32. Stressful environment leads to unhealthy behaviors such as poor eating habits, which ____ increase the risk of heart disease.

31. The engineers are going through with their highway project, ____ the expenses have risen.

50. You can find more information through the ______ and the websites.

59. 与不同经历的人相处会有助于开阔你的视野。

29. Do what you think is right, ____ they say.

34. The two sportsmen congratulated each other ____ winning the match by shaking hands.