5 Over a hundred people must have been driven away.______ they were.a．I think b．I'm sure c．Certain d．Of course 选A为什么
问题描述：
5 Over a hundred people must have been driven away.______ they were.
a．I think b．I'm sure
c．Certain d．Of course
选A为什么
答
选a 其他的都不太通
答
因为第一句话中用到了over a hundred,表示“一百以上”,这是一个虚数,所以用不太肯定的选项“I think”.其他选项都太肯定了.