Older people need to keep both
A. physically and mentally active
B. be alert and receptive
C. engage in mental activities
D. the benefits of challenging the brain
E. beneficial and happy
F. maintain mental alertness
查看答案
A．surelyB．finallyC．probablyD．gradually
A. surely
B. finally
C. probably
D. gradually
From this article we have learned that the Arabs__________
A. made more discoveries than the Romans.
B. helped to preserve the Roman medical works.
C. discovered more about the way the human body works.
D. Occupied big parts of the old Roman lands 2,000 years ago.
Systematic desensitization and exposure therapy are similar ways of treating pho-bias, because
A. both involve gradual exposure of phobics to fear stimuli
B. both are behavioral methods
C. both use anti-anxiety drugs
D. both use antidepressant drugs
【B20】
A. stop
B. continue
C. insist
D. default
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