1. Where is your mother? – She is in the kitchen. She ______(cook) the dinner.
2. Your brother often ______ (go) to school by bus last year?
3. He often played football when he (be).....................young.
4. Trung is learning to play the guitar. He (have)...................guitar lessons twice a week.
5. Look! The plane (fly)............................ toward to the airport. It (land)..........................
6. Take these medicines and you (feel).................... better then, Ha.
7. I.............. (have) a birthday party tomorrow evening. Would you like........... (come)?
8............. he........... (like) milk or tea?
9. Where is Nam?- He (watch)........................ TV in his room at the moment.
10. I often go to school by bicycle but today I........... (go) to school by bus.
11. My best friend (write).............................. me a letter several time.
12. If it (be)..............nice tomorrow. We (plant).......................some young trees.
13. -...................you ever (see)....................a real robot at work?
- No, never.
14. Do you think there (be)..................a city underwater?
15. I (never, see).............................such a big flower.
16. He (never meet).....................her before.