题目

1The series of books about HarryPotter are be coming more and more popular ,and it ___ the best selling series of __ books in history .
A became girl's B has become children's C has became children's D has became boy's E has become boy's
选那个请说理由 我要理由

提问时间：2020-11-13

答案

B这句意是：一系列关于哈利波特的书正在变得越来越受欢迎,这些书正在变成儿童书销售历史中卖最好的.
B,C,D三个选项都是用has done 的.首先可以排除掉C,D ,因为become-became(过去式）-become（过去分词）.然后在这个句子中,不能用过去式.因为书的以后也是在卖的,并不是发生、结束在以前的,用现在完成时,说明是到现在为止一直在做,可能会持续的状态的.
至于后面那个词,应该用复数,如果用boy ,应该是boys'.