Over a hundred people must have been driven away.____they were.a.I think b.I'm sure c.Certain

问题描述:

Over a hundred people must have been driven away.____they were.a.I think b.I'm sure c.Certain
Over a hundred people must have been driven away.____they were.A.I think B.I'm sure C.Certain D:Of course选哪个好点?为什么呢?

B