--Why do you like living here？ -- Because it’s quite quiet. There are              cars on the street.

He usually goes to school ____ bike, but sometimes he _____a taxi to school.

Boys_________ model planes to dolls, while girls _________ have dolls than model planes.

 He has lost his pen. He is _______  it everywhere.

 —I don’t know if Dr. White _______ to the party next week?—I think he will come if he ________ free.