1. I ……have been studying ….. (study) here for more than three years.
2. What a nice dress! Where ……did you buy….. (you/buy) it?
3. Don’t forget to take your umbrella. It …is going to rain……. (rain)
4. Our class ……organises…. (organise) a writing contest. We have to write about theenvironment.
5. Give old clothes to charity instead of ……Throwing…. (throw) them away.
6. Encouraging people ……to use….. (use) public transport is a great way to reduce traffic jams.