2016年4月湖北自考英語(yǔ)二真題練習(xí)：填句補(bǔ)文

湖北2016年4月自考英語(yǔ)二真題練習(xí)：填句補(bǔ)文

單選題

[填句補(bǔ)文]Doctors believe that secondhand smoke may cause lung cancer in people who do not smoke because nonsmokers often breathe in the smoke from other people‘s cigarettes.________. The US Environmental Protection Agency reports that about 53，000 people die in the United States each year as a result of exposure to secondhand smoke.

A.The risk is even higher for children who live in homes where both parents smoke.

B.In the United States，nine million children under the age of five live in homes with at least one smoker.

C.This smoke is called secondhand smoke.

D.No one knows for sure why Mr. Gilson has lung cancer.

正確答案：C

答案解析：前一句提到，不吸煙者時(shí)常吸入他人香煙中冒出的煙，接下來(lái)應(yīng)首選對(duì)此煙加以定義的句子。