Rewrite the sentences: Give the right tenses and forms of the verbs in brackets

Giúp mik bài này với ạ mik đang cần gấp;-; 
Mik cảm ơn nhiều ạ
Rewrite the sentences: Give the right tenses and forms of the verbs in brackets:
1. Since the early summer, we (take) part in (study) some of subjects on the internet. (Online)
2. He (paint) that gate when I came (see) him. He felt very happy at that time because we (not meet) each other for along time.
3. Next time, we hope (see) our schoolmates at Nguyen Hue high school.
4. She is one of my teachers who (help) you (type) the report before.
5. Nobody (enjoy) (swim) when it is so cold.
6. English is the one of the most international languages, so all of you need (study) it so that you can use to it perfectly every time.