1. My classmate refused to go to the movie with me, he hate films.
->My classmate who hates films refused to go to the movie with me
2. We climbed up the mountain. we had a picnic there.
->We climbed up the mountain in which we had a picnic
3. Trang has just moved to hue. her father died last month.
->Trang, whose father died last month, has just moved to hue
4. The children don't want to swim in that river. it looks very dirty.
->The children don't want to swim in that river that looks very dirty
5. Huy is reading a very interesting storybook. you lent it to him last week.
-> Huy is reading a very interesting storybook which you lent to him last week