The plastic bags were first produced in the 1970s and grew increasingly popular since the
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【B10】
A. of
B. among
C. by
D. including
听力原文：How about farmers' income in the late 1970s？
(34)
A. Farmers had less money to spend than other Americans.
B. Farmers earned about one-third the income of non-farmers.
C. Farmers earned almost as much money as the non-farmers.
D. Farmers earned more money than the average American families.
Many food-carrying bags, made from high density polyethylene, are extremely difficult to recycle.
A. Y
B. N
C. NG
A．A druggist's suggestion.B．An article.C．An advertisement.D．A sales clerk's comment.
A druggist's suggestion.
B. An article.
C. An advertisement.
D. A sales clerk's comment.
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