当你进了Ms.Miller的办公室,她说:Sit down,please!你应该回答: A.Yes,I sit down. B.Thanks. C.please
The number of pandas is getting ____ because their living areas are becoming farmland.
We agreed ___________ to see a film this Saturday evening.
We are all here ____ Lily. Where is she?
Mike likes mountains and lakes. He hopes to ____ nature when he is free.
There are about ____ people in the hall.