Doctors are doing research to find out what happens physically when people ______ smoking.
A．quit　　B．declineC．depart　D．reserve
A
本題考查動(dòng)詞辨析。句意為“醫(yī)生們正在研究以便發(fā)現(xiàn)當(dāng)人們戒煙時(shí)，他們身體上將會(huì)發(fā)生什么情況”。decline下降；prevent阻止；reserve預(yù)訂。
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