Question

【题目】--Do you know the boys_______ playing football on the playground?

--Yes,They are all from Class 1.

A. who are

B. who is

C. that is

Answer 1

【答案】A

【解析】句意：——你知道那个在操场上踢足球的男孩子吗？ ——知道。他们都来自一班。考查定语从句。先行词为boys，关系词who, that 都可以；先行词在从句中作主语，因此谓语和它保持一致，用复数。故选A。