— Must I take my umbrella?    

— No, you ______. It's not going to rain. [ ]

A. mustn't

B. needn't

C. haven't to

D. can't

世界人种是依据以下哪些方面特征来划分的（　　）

A．肤色、眼色特征

B．毛发、头型特征

C．脸型、头型特征

D．人类体质方面的特征