11.You didn't remember to turn off the TV last night, did you?
12.Why don't you go to work by bike?
13.More trees will be planted along this street.\
14.Pollution is the most serious problem, isn't it?
15.Tokyo has fewer billionaires than New York.
16.Did a group of foreigners visit the slum last week?
17.The countryside suffers less pollution than the city.
18.London has more skyscrapers than Ha Noi