cuse me(请原谅)A.ex B.eks
WhatLucy and Ben ? A.is doing B.are doing C.are do
Kate is to the woods. A.runing B.run C.running
We are doingexperiment. A.a B.an C.the
The bird can't . A.fly B.sing C.swim
?I see a river. A.What do you see? B.What are you doing? C.What do you do?