Over a hundred people must have been driven away._______they were.A I think B I'm sure C Certain D Of course
问题描述：
Over a hundred people must have been driven away._______they were.
A I think B I'm sure C Certain D Of course
答
D
表示连接 意思为他们自然是要被驱逐
C 若为Certainly 也可
若用A B 便成为独立的两个句子