Cats and tigers are animals of the cat family(猫科动物),so cats ______ tigers in many ways.
The Smiths are having dinner at home at the moment.
________ we plant,__________ our city will be.
_________ music she is playing!
—Must I finish my homework at school? — No, you_____. you can do it at home
—Could you tell me________? — He is in his office.