----Time to go to bed, Mary.----Oh, mum. I won’t go to bed _______ I finishes my composition.
If Jim ______ free tomorrow, I will ask Tom to go instead.
Study hard, _______ you will fail in the exam.
The room is not bright enough. I need to _______ a light in the room.
---Don’t forget to close the windows when you leave the classroom. --- _________
Our teacher told us _______ make _______ noise.