Complete the Sentences with the correct form or tense of the verbs in brackets.
1. If people share their cars to go to work, there ____ ( not be ) so many car fumes.
2. I _____( study ) here for more than three years.
3.  What a nice dress ! Where _____ ( you/buy ) it ?
4. Don't forget to take your umbrella. It _______ ( rain ).
5. It we ____ ( recycle ) paper products, we _____ ( save ) more trees.
6. Our class ____ ( organise ) a writing contest. We have to write about the environment.