问题补充:
is of no concern to us.
A. It rain or not
B. If or not it rains
C. Whether it rains or not
D. Will it rain or not
答案:
A. It rain or not
B. If or not it rains
(答案→)C. Whether it rains or not
D. Will it rain or not
解析:这题考察whether引导的主语从句,主语从句必须有连接词,AD都没有,B项的if不能和or not连用,句意是:是否下雨和我无关,选C.