59.在加工过程中，会重新人为加入某些食物的维生素和矿物质，但却未必和原来的一样健康。

44. What can we learn from the passage?

10.

23. If we ______ adequate preparations, the conference wouldn’t have been so successful. 

（ ）53.Dan is interested in taking wildlife photographs and enjoys the kind of programme which gives him a chance to see a professional photographer at work.

4.

（ ）51.Although Rob lead a quiet life in a small village, that doesn’t stop him from wanting to find out about the latest scientific development.

63.我们真希望你昨晚没那么多工作要做,因为我们都知道你肯定会在晚会.上玩得很开心。

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

24. Only after my friend came ______.

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

21. ______ the course very difficult, she decided to move to a lower level.