1.I did not know ___ him or not.A.whether to help B.if to help C.how to help D.what to help

问题描述:

1.I did not know ___ him or not.A.whether to help B.if to help C.how to help D.what to help

A 我知道应不应该帮助他.一般whether 都与 or not 连用的