26. ——Do you think English is difficult ?

—— ________________. It’s my favorite .

A I don’t think so  B I think so  C  I agree  D That’s true

27. John likes animals, and he is ____ in plants .too.

A happy   B interested  C difficult D guilty

28.  —— Why did dinosaurs died _____ suddenly ?

—— Nobody________.

A of , know B of, knows  C out, knows  D out, know

29.  I hope to work _____one day.

A space   B in space   C on space   D at space

30. When I was young, I _____ any money.

A didn’t used to have   B didn’t use to have

C didn’t use to having  D didn’t use having