47. Different kinds of stress:(1) Good stress: ①You might feel excited when you speak in public.②You will do the job well.③You will ______ if the stress pushes you to prepare beforehand.

49. How to keep stress proper:(1) Have a balanced life.(2) Have and have healthy food.

64.我们已研制出了能大规模提高生产的方法。

29. Some students have difficulty _____ English, so they often ask their English teacher for help. 

48. (2) Bad stress: Stress can last long if you are___ to deal with your problems. It can actually let you do worse in your daily life.

（ ）51. Simon has got many pen friends and net friends home and abroad. He loves this school and wishes that he could do something to have more people know about it, those excellent teachers and students, the activities and its glorious achievements.

20. The new highway is almost _____ than the old one. 

12.根据原文"People who are nearsighted can only see things that are very close to their eyes."可知近视眼只能看清近处的事物，与题干不符。故错误。

（ ）13. Glasses help people to remedy their eyes.

27. How much _____ she looked without her glasses!

17. My boss ordered that the legal documents______to him before lunch.

30. This pair of shoes_____ my brother’s. It’s too small for him.