单选题
Our public transportation is not
sufficient
for the need of the people in our major cities.
A. additional
B. efficient
C. excessive
D. adequate
A
B
C
D
【正确答案】
D
【答案解析】
sufficient和adequate都可以表示“足够的、充分的”;additional:附加的、另外的;efficient:高效的;excessive:过多的、过度的。
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