[单项选择]All this （　） that knowledge comes from practice.
A. speaks
B. proves
C. explains
D. teaches

[单项选择]All this（）that knowledge comes from practice.
A. speaks
B. proves
C. explains
D. teaches

[单项选择]No culture exists in . It all comes from someplace. Ancient customs were modern one time.
A. vacuum
B. emptiness
C. blank
D. space

[单项选择]

Stress is with us all the time. It comes from mental or emotional activity as well as physical activity. It is unique and personal to each of us. So personal, in fact, that what may be relaxing to one person may be stressful to another. For example, if you’’re a busy executive who likes to keep occupied all of the time, "taking it easy" at the beach on a beautiful day may be extremely frustrating, nonproductive, and upsetting. You may be emotionally distressed from "doing nothing." Too much emotional stress can cause physical illnesses such as high blood pressure, ulcers, or even heart disease. Physical stress from work or exercise is not likely to cause such ailments. The truth is that physical exercise can help you to relax and to better handle your mental or emotional stress.

Which of the following people would find "taking it easy" stressful （）
A. Construction workers.
B. Business executives.
C. Farm workers.
D. Truck drivers.

[单项选择]Income in general comes from （）
A. wages and salaries, interest
B. wages and salaries, rent
C. interest and rent
D. wages and salaries, interest, rent and profits

[填空题]Students’ pressure sometimes comes from their parents. Most parents are well{{U}} (36) {{/U}}, but some of them aren’t very helpful with the problems their sons and daughters have in{{U}} (37) {{/U}}to college, and a few of them seem to go out of their way to add to their children’s difficulties. For one thing, parents are often not{{U}} (38) {{/U}}of the kinds of problems their children face. They don’t realize that the{{U}} (39) {{/U}}is keener, that the required{{U}} (40) {{/U}}of work are higher, and that their children may not be prepared for the change{{U}} (41) {{/U}}to seeing A’s and B’s on high school report cards, they may be upset when their children’s first{{U}} (42) {{/U}}college grades are below that level. At their kindest, they may gently{{U}} (43) {{/U}}why John or Mary isn’t doing better, whether he or she is trying as hard as he or she should, and so on.{{U}} (44) {{/U}}. Sometimes parents regard their children as extensions of themselves