当你在电话里介绍自己时,你应该说:______A.Hello. This is Mark. B. Hello. I am Mark.
There is some under the tree . A. sheep B. chick C. rabbit
the money on the right your son’s ? A. Do B. Does C. Is
What are these ? kittens . A. It’s B. They’re C. The’re
the boy play hockey ? A. Can B. DoC. Is
there an armchair there ? Yes . A. Be B. AreC. Is