He comes here every day--it rains heavily. A.besides B.excep

c.except when.除非下大雨,他每天都会来这.这是一个except when + 时间状语从句 例：
Most of the Chinese people usually go to work on the bike except when it rains.
"除了雨天,大多数中国人一般都骑自行车上班."