Alan is a careful driver, but he drives of my friends.
A. more carefully
B. less carefully
C. the most carefully
D. the least carefully
网友回答
A. more carefully
B. less carefully
C. the most carefully
(答案→)D. the least carefully
解析：短语辨析。more carefully更细心的;less carefully更不细心的;the most carefully 最细心的;D. the least carefully最不细心地.句意:阿兰是个细心地司机,但是在我的朋友们中开车最不小心.结合语境可知选D.最不小心的.