— Does your Dad quit smoking, Jenny?

— Yes, but he ____ for almost ten years.  [ ]

A. smoked

B. was smoking

C. has smoked

D. had smoked

雷诺现象的皮肤颜色变化顺序为（）

A.红→白→紫

B.紫→红→白

C.紫→白→红

D.红→紫→白

E.白→紫→红