问题
选择题
With the development of science and technology, the prices of TV sets have ________.
A．gone down
B．went down
C．brought down
D．been gone down
答案
答案：A
答案 A [考查动词词义辨析。go down为不及物动词词组，没有被动语态，且表示完成，故选A。]
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