Be quick.__you'll miss the early busA andB thenC afterwardsD or
问题描述：
Be quick.__you'll miss the early bus
A and
B then
C afterwards
D or
答
or 否则，要不然
答
D 表示“否则” “不然的话”，由句意可知，提醒快一点，否则会迟到
答
D.要不然
答
D 否则
祝你开心。
答
D
= If you aren't quick,you'll miss the early bus
or= otherwise; or else 否则
如果是肯定意味,用and
如：
Use your head,and you'll find a way.
开动脑筋想想,你会找到办法的
= If you use your head,you'll find a way.
不懂追问*^__^*