He usually goes to work by bike it rains.A. exceptB. except whenC. except forD. except t

问题补充：

He usually goes to work by bike it rains.

A. except

B. except when

C. except for

D. except that

答案：

A. except

(答案→)B. except when

C. except for

D. except that

解析：except when 和 except that 后均可接句子，但前者含“当……的时候”的意思，而后者则没有这个意思。