Mr. Smith is in good health now for it is quite a long time since he __________.
A. not smoked
B. smoked
C. has smoked
D. began to smoke
正确答案:B
参考解析:暂无解析

Mr. Smith is in good health now for it is quite a long time since he __________.
A. not smoked
B. smoked
C. has smoked
D. began to smoke
正确答案:B
参考解析:暂无解析