问题补充:
---- What are they doing?
---- Look, they on the playground.
A. are running B. runs C. is running
答案:
解析:本题问句问的是现在正在做某事,所以回答语使用现在进行时,结构为be+现在分词doing,本题的主语为复数,故be用are,故本题选A。
时间:2021-12-11 19:39:30
---- What are they doing?
---- Look, they on the playground.
A. are running B. runs C. is running
解析:本题问句问的是现在正在做某事,所以回答语使用现在进行时,结构为be+现在分词doing,本题的主语为复数,故be用are,故本题选A。