问题补充：
The young man used to to work,but he is used to to work now.
A. drive,walking.
B. drove,walked.
C. drive,walks.
D. driving,walk
答案：
(答案→)A. drive,walking.
B. drove,walked.
C. drive,walks.
D. driving,walk
解析：used to do sth表示过去常常做某事，be used to doing sth，表示习惯于做某事，故选A
