— You’d better keep quiet in class.— Sometimes I______ . Yesterday, I was as quiet as a mouse during my English class.
Stephen Hawking believes that the earth is unlikely to be the only planet life has developed gradually.
The plan just because people were unwilling to cooperate (合作).
I stayed there for only two days but felt like two weeks.
— Do you really want to go out? — It may rain. , I shall go out; I don’t mind the rain.
Many students are about football. They play a game whenever possible.