The market-research department conducted a______on how often people listen to the radio while driving their cars.

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问题 The market-research department conducted a______on how often people listen to the radio while driving their cars.

选项 A、design
B、response
C、survey
D、broadcast

答案C

解析 从the market—research department“市场调查部门”以及on后面的内容可知,空格应该填入有“调查”之意的单词。survey“调查”符合题意。
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