Complete the sentences with the correct form of the verb. 1. We (do) _______________________ this for you if you want. 2. The weather (be) _____________________ quite good since Christmas. 3. If we (need) _______________________ some help, we will ask. 4. They enjoy ________ (watch) the Olympics on TV. 5. Children shouldn’t ________ (buy) firework at Tet. 6. You ________ (meet) Hien and Phuong three days ago? 7 I love ________(do) judo. 8. Nam ________(go) to the post office twice yesterday. 9. I ________ (leave) my school bag at school this morning. 10. Mr. Quang ________ (teach) math in this school since he ________ (graduate) from the university in 1989. 11. Look! The singer ________(come). She ________ (have) long black hair. 12. Where (be)________ Son? He (read)________ books in the library. 13. I (have) _____________________ this bike since I was a teenager and I still use it. 14. I (study) _____________________very hard for this examination.