giúp mình I. Give the correct form of the verbs in brackets.
1. The eighth-form students (learn) ____________________ English for three years.
2. When Nam and Ba came, I (take) __________________ a shower.
3. If we go on littering, our environment (be) ________________ seriously polluted.
4. My father used to (work) ________________ for that company when he was young.
5. If I am free, I (go) __________________ to the cinema.
6. What about (practise) ________________ English everyday.
7. I wish I (can) ________________ play the piano.
8. She (not come) __________________ here yesterday.
9. They (already see) ___________________ that play.
10. I (see) __________________ you tomorrow.
11. I suggest (turn) __________________ off TV before going out.
12. If he comes here in spring, he (have) _________________ a chance to go to the flower fair.
13. If he (know) ___________________ this story, he will help you.
14. I (not see) _____________________ Mary since last month.
15. They (work) _____________________ in the garden at two o'clock yesterday.