In America, turkey is served as the maincourse on special ________.

Did your father come back early last night? — YesIt was not yet eight o’clock ____ he arrived home[ ]

We all think it is Mr Wang as well as his parents that _______ for his son’s bad performance at school

I think London is the best place for us.—I don’t agree ________ your opinion, for the climate there doesn’t agree ________ us

Not everyone has realized what_______important part the balance of________ nature plays in their life.