Use the correct form oc the verbs in brackets:
1. Please stop (talk)...........; I (try)..........(finish)...........a letter to the Y&Y Green Group.
2. His doctor advised hin (give up)............(smoke)......... .
3. By(work)........day and night he succeeded in (finish)...........the job in time.
4. There (be)........many volunteers in SEA GAMES 22 nd in Viet Nam in 2003.