Exercise 1: Choose the best answer to complete each of the following questions. 1. In the past, men __________ wear ao dai, but today they __________ wear it. A. had to – didn’t have to B. had to – doesn’t have to C. had to – don’t have to D. had to – had to 2. Mai An Tiem was very __________ to move to a deserted island. A. brave B. honest C. kind D. generous 3. __________ cars were there in the car park? – Nine. A. Why B. Who C. How many D. What 4. ___________ does she brush her teeth? – Twice a day. A. How B. How long C. Why D. How often 5. __________ photo is he looking at? A. Whose B. Who C. When D. How 6. Jane __________ the piano when I __________. A. played – was coming B. played – came C. was playing – came D. was playing – was coming 7. When my mother __________, my brother __________ the vase. A. cooked – broke B. was cooking – broke C. was cooking – was breaking D. cooked – was breaking 8. You should buy the blue sweater. It suits you __________ than the red one. A. good B. well C. better D. the best 9. The __________ of Quan ho singing has been recognized as a world heritage. A. preservation B. procession C. song D. performance 10. Saint Giong was unable to talk, smile, or walk __________ he was three years old. A. even though B. because C. while D. if 11. It's a rule, so everyone __________ strictly follow it. A. doesn't have to B. shouldn't C. have to D. mus