Question

【题目】The library keeper is worried, because the number of readers ________ smaller and smaller.

A.is becomingB.are becomingC.becameD.will become

Answer 1

【答案】A

【解析】

句意：图书管理员很焦虑，因为读者的数量正变得越来越少。

根据句意指读者的数量正变得越来越少，所以要用现在进行时；又因为the number of作主语，谓语动词用单数形式，故选A。