— Does Tommy love taking exercise every day?— Yes. He goes jogging every day it rains or

问题补充：

— Does Tommy love taking exercise every day?

— Yes. He goes jogging every day it rains or snows heavily.

A. when

B. as

C. unless

D. if

答案：

A. when

B. as

(答案→)C. unless

D. if

解析：根据句子的内容，表示除非….，=if not，故选C