[单项选择]（　） do you have PE lessons
—Three times a week.
A. How long
B. How soon
C. How many
D. How often

[单项选择]You will have to practice ______ times before you can do it.
A. many more
B. more often
C. more many
D. more several

[单项选择]

Have you ever wondered why different animals or pests have their particular colors Colors in them seem to be used mainly to protect themselves.
Birds, especially seagulls, are very fond of locusts, but birds cannot easily catch locusts because locusts change their colors together with the change of the color of crops. When crops are green, locusts look green. But when crops are ripe, locusts take on exactly the same brown color as crops have. Some other pests with different colors from plants are usually easily found and eaten by their enemies. So they have to hide themselves in terror for lives and appear only at night.
If you study the animal life in any part of the world, you will find the main use of coloring is to protect themselves. Bears, wolves and other beasts move quietly through forests. They are usually invisible to the eyes of hunters, because they have the color much like the barks of trees.
An even more strange act remains to be noticed. A
A. the change of color in locusts
B. the protective coloration of animals and pests
C. how a certain sea fish protects itself
D. animals or pests can dye themselves different colors

[单项选择]______ you have done might do harm ______ other people.
A. That; to
B. What; to
C. What; for
D. That; for

[单项选择]What should you do if you have got some polish on the skin around your fingernail
A. Watch your brush.
B. Clean up as you go.
C. Apply in minimal sweeps.
D. Start with clean nails.

[单项选择]（）you have to do is more practice.
A. All that
B. All what
C. That
D. which

[单项选择]Do you have any pen friends
A. children
B. pals
C. writers
D. students

[单项选择]You do not expect the types of variances that have occurred on the project to date to continue．If BAC=300，ETC=275，PV=300，AC=200，EV=250，and CPI=1.25，what is the EAC ？（）
A. 240
B. 250
C. 475
D. 150

[单项选择]

Times have changed and the ideas of the young and the old about the same thing are often ill contra diction. For example, parents and teenagers often disagree about the amount of freedom and responsibility that young people (21) to have. The teenager is more independent and often wants to be (22) to choose his own friends, select his own courses in school, plan for his own vocational (23) , and earn and spend his own money, and generally (24) his own life in a more independent (25) than many parents are able to (26) .
Most problems (27) teenagers and their parents yield to (导致) (28) planning and decision making. Within ally particular family, (29) are avoided and problems are solved when all of the persons take (30) in the situation, and (31) in working it out. (32) parents and young people learn how to get (33) well with each other and develop skills in understanding and (34) A. join
B. together
C. individual
D. joint