Sửa câu `3`: You haven’t gone to Rio de Janeiro, have you?
`6.` We don’t have to go yet, do we?
`7.` You don’t like pollution, do you?
`8.` I think a megacity is a very large city with a big population, isn't it?
`9.` You won’t tell anyone, will you?
`10.` The number of English speakers is increasing very quickly, isn't it?
`11.` You need an English – Vietnamese dictionary, don't you?
`12.` You have never watched any films made in Bollywood, have you?
`13.` You’re waiting for your letter, aren't you?
`14.` We had a good time, didn't we?
`15.` Some people commit crimes when they have no money and no food, don't they?
`16.` You enjoy living in a peaceful neighborhood, don't you?
`17.` It’s hot today, isn't it?
`18.` The factory will bring more jobs to local people, won't it?
`19.` You forgot to bring your textbooks this morning, didn't you?
`20.` The idea can change the solution, can't it?