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.