题目

如图是某生物的精细胞，据图判断来自同一个次级精母细胞的是（ ） A．①②B．②④C．③⑤D．①④ 答案：B--- It's getting dark. I must go now.--- No, you . I'll drive you home in a minute.A.mustn'tB.don't have toC.shouldn'tD.can't