In the US; there is a long waiting list for orgasm because ______.
A. there is a shortage of actual organs
B. only a few people become organ donors
C. doctors have set a limit to the number of organ recipients
D. transplant surgery is still experimental
Which of the following is NOT mentioned in the passage？
A. Chickens are fed on food which is little better than garbage.
B. Chickens live in very crowded condition.
C. The eggs chickens produce lack vitamins.
D. Chickens are flee to move about.
Food that is rich in organic matter ______.
A. has been nourished by fertilizers
B. contains vegetable matter that has not been consumed
C. has had chemicals and fertilizer added to it
D. contains large quantities of vitamins
【39】
A. pressures
B. depression
C. stress
D. anxiety
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