Look the Maths teacher with his students on the grass to have a good rest at present.A. i

问题补充：

Look, the Maths teacher with his students on the grass to have a good rest at present.

A. is lying

B. is lieing

C. are lying

D. be lying

答案：

(答案→)A. is lying

B. is lieing

C. are lying

D. be lying

解析：句意：看，这个数学老师正在和他的学生躺在草地上休息。with连接两个主语时，重点强调前者，谓语动词的数与第一个名词的数保持一致，本题中数学老师是主语，故用单数形式，lie表示“躺着”，现在分词的形式是lying,故选A