What is Jack _____(A.do B.does C.doing)?
问题描述:
What is Jack _____(A.do B.does C.doing)?
He is ____(A.eating B.ate C.eat) his breakfast.)
答
doing
be doing 这是固定搭配 现在进行时
eating
同上 这也是现在进行时 表示某人正在做某事