How did it come ----- that humans speak so many different languages?--A.across B,about C.down

分类: 作业答案 • 2021-12-29 16:29:27

问题描述：

How did it come ----- that humans speak so many different languages?--A.across B,about C.down
D.out

答

B,come about发生,产生；实现.相当于不及物动词,在这里that引导的从句是真正的主语,it是形式主语