关于if,whether,that的一道英语题
-I don't know _______Jim will come this afternoon.
-Don't worry._______he comes,I will let you know.
A.whether；If B.if；Whether
C.when；whether D.that；If
选哪一个,要说明理由~
if 不是有两种意思的嘛~
是否和如果！