Our classroom is as big as _______.
—Where are Tom and Mary? --____ Tom _____ Mary is busy with their homework. You’d better play with.
—Jack, what do you usually do after supper? --Well, I____ stay at home and watch TV, but now I ____ taking a walk.'
–We should do what we can _____ the endangered animals.` --Yes, it’s duty_____ them.
–Mary, could you tell me if your mother _____ our school sports meeting tomorrow? --I think she will come to school if she _____ free.
–Who is _____ English teacher, Jim? --Mr Wang teaches _____ English.