Jack doesn’t smoke now but he for almost twenty years.A. was smokingB. smokedC. has smok

问题补充：

Jack doesn’t smoke now, but he for almost twenty years.

A. was smoking

B. smoked

C. has smoked

D. had smoked

答案：

A. was smoking

(答案→)B. smoked

C. has smoked

D. had smoked

解析：考察时态。本题容易错选C。实际上本题是描述在过去中所发生的事情，并不强调对现在的影响，故使用过去时就可以了，强调过去和现在的对比。句意：Jack现在不抽烟，但是他抽了几乎的烟。