Pro-social games enable participants to
A. skillfully accomplish the required tasks.
B. select medium puzzles for their partner.
C. be integrated into different social groups.
D. conduct helping actions to their partner.
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If it had not been watched by the government, GM would probably have
A. imposed no pressure on bondholders to take the 10% equity stake.
B. cut the percentage of equity stake controlled by the UAW.
C. torn up its UAW collective bargaining agreement in an illegal way.
D. launched staff-downsizing and reduced workers" wages and benefits.
Which of the following is true according to the first paragraph？
A. Video games are usually considered harmful to one"s mind.
B. Video games involving shooting will lead to violent behaviors.
C. People"s views toward video games have always been controversial.
D. Video games will influence the youth throughout their lives.
What can we infer from the last paragraph？
A. General relativity is actually ungrounded at all.
B. The calculation of the orbits shows that equivalence principle is violated.
C. More should be done to prove the correctness of equivalence principle.
D. A new revolution in physics has already arrived.
The growth of American agriculture has been mainly stimulated by
A. the productivity growth.
B. low prices of food.
C. rising standards of living.
D. the exportable surplus.
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