—I’m going to Sanya for the summer holiday. —________! 

 — If we go on polluting the world, it won’t be fit for us to live in.— ____. We’ve got to do something about pollution.

—Reading is the best way to pass time on the train.—          , I never go traveling without a book.

—What’s the matter with Della?—Well, her parents wouldn’t allow her to go to the party but she still _______.

—Bad luck. I scored rather low in the test.  —       . Or you'll have to leave school.