老师让你擦黑板,你应该说 .A.All right. B.Oh no. C.No ,he didn’t.
What the elephant doing? A. isB. are C. am
The horse is . A. runB. runningC. running
Daming and Sam playing football. A. is B. are C. am
WhatSam and Amy doing? A. is B. areC. am
We can seeinteresting things. A. lot ofB. a lots of C. lots of