The boys in school uniforms are sitting quietly under a big tree,___a book.A.each of them reads B.they each read C.everyone reads D.each reading 正确答案是D,求讲解
问题描述：
The boys in school uniforms are sitting quietly under a big tree,___a book.
A.each of them reads B.they each read C.everyone reads D.each reading 正确答案是D,求讲解
答
因为如果选用其它三个选项任何一个 逗号后面的都是个句子了 同一个主句里不包含从去情况下就有两个主语 两个谓语 两个宾语 是不符合语法的