Tim has been in Australia.His brother hasn't seen him( ) January.A.for/B.since/C.from/D.by选哪个?麻烦请详细讲解每个选项的意思

问题描述:

Tim has been in Australia.His brother hasn't seen him( ) January.A.for/B.since/C.from/D.by
选哪个?麻烦请详细讲解每个选项的意思