47. What is the main idea of the second paragraph?
(A) High-tech billboards do not collect personal information.
(B) People do not mind the billboards tested in Japan and in the U.S.
(C) Advertisers are not senstive to people’s concerns about privacy.
(D) People are worried about information collection initiated by companies using digital billboards.
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統計: A(44), B(5), C(17), D(335), E(0) #1280209
統計: A(44), B(5), C(17), D(335), E(0) #1280209