Smile to the world,_____the world ,____the world will smile back to you

问题描述:

Smile to the world,_____the world ,____the world will smile back to you
A.nor B.but C.or D.and

D这是【祈使句,and + 陈述句(常用will + 动词原形)】句型在这个句型中,前面的祈使句表条件如:Work hard,and you'll catch up with him.=If you work hard,you'll catch up with him.如果条件部分带否定意味,中间...思路是什么?你再看,来龙去脉我都说了