17. He was very busy yesterday; otherwise, he _____ to the meeting.

10.

46.The ______ of bacteria causes body odor.

（ ）15. People who have a large order can be given a special discount.

65.可能你公司正面临一些我们不了解的困难。

28. I have heard a lot of good things about you ______ I came back from abroad.

25. I keep the picture where I can see it every day, _____ reminds me of the days in my hometown.

36. Dr. Aiken cut the background from the photos for the purpose of______.

50. Try to eat light and avoid greasy,______ and salty food because it adds toxins to the body.

（ ）52. Bella enjoys eating out but can’t afford to spend very much at the moment as she is saving for a holiday. She has never learnt how to cook, so now might be quite a good time to find out!

32. Bob thought he couldn’t go to the party because he had to write a report, but he went ______.

57.众所周知，贸易和专门化相辅相成，使我们每个人能使用更多的产品。