II. Choose the best answer: 1. They ................... students yesterday. a. am b. is c. was d. were 2.They ............. doctors two years ago. a. am b. is c. was d. were 3. They ............... farmers last month. a. are b. is c. was d. were 4. We ....... nurses yesterday. a.are b. is c. was d. were 5. The weather ........ cold yesterday. a.aren’t b. isn’t c. wasn’t d. weren’t 6. I .........a pupipl last week. a.aren’t b. isn’t c. wasn’t d. weren’t 7. These hats .......new yesterday. a.aren’t b. isn’t c. wasn’t d. weren’t 8. My parents........teacchers two years ago. a.are b. is c. was d. were 9. He .............a mechanic last Monday. a.aren’t b. is c. wasn’t d. weren’t 10. ... he an engineer yesterday. No, he ...... a.is/ is n’t b.are/aren’t c.was/wasn’t d.were/weren’t 11. .......It hot last week? a. am b. is c. was d. were 12. The shops ...open last Monday. a. am b. is c. was d. were 13. .... you a teacher two years ago? Yes ,I....... a.is/ is n’t b.are/aren’t c.were/wasn’t d.was/weren’t 14. Where ......Nam from yesterday? a. am b. is c. was d. were 15. Why .........they unhappy last Tuesday? a. am b. is c. was d. were 16. I ... your trip to Nha Trang two years ago. a.remember b.remembers c.remembered d.rememberred