—Is this a toy car, Jane? —____A. Yes, it’s.B. No, she isn’t.C. Yes, it is.
--_____ with you? --I have a score throat.
–Excuse me, Mr. He, are you free? Lin Tao and I want to tell you _____. –Sure.
He is finishing _____ a funny story. And he is thinking about _____ to Beijing for a vacation.
David has a stomachache. _____ .
Mr. Brown is 70 this year. Although he is very old, ____ he works very hard.