A-A+
As mentioned in Paragraph 3 tobacco companies
问题详情
As mentioned in Paragraph 3, tobacco companies in the U. S. began marketing______ in the 1970s.
A．high-class cigarettes
B．low-class cigarettes
C．light cigarettes
D．low tar brands请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：细节题型见第三段第一句：The class will include anyone who purchased light cigarettes from the time tobacco companies began selling them in the 1970s．由此可见烟草公司在二十世纪七十年代开始将淡烟投入市场；因此C为答案。
