Điền từ để hỏi thích hợp để hoàn thành các câu sau.

1.______ have you give up smoking? For about two years.

2.______ place is more densely populated-Ha Noi or Ho Chi Minh City?

3.____ broke Jane's favorite vase? Her brother did it.

4.____ does Mr.Brown do? He's a researcher

5.____ ethnic groups are there in your country?

6._____ is your grandmother? She's ninety years old.

7._____ does your English teacher look like? She's young and pretty.

8._____ water should we drink every day?

9._____ did you use to go to school? I used to go on foot.

10._____ is it from here to the nearest police station?

11._____ songs is this singer performing? He is performing Trinh Cong Son's songs.