Using : NOT HAVE TO / MUSTN'T / CAN / COULD
• George has traveled a lot. He ___ speak four languages.
• I can’t sing now but I ___ sing very well when I was a child.
• She will stay in bed till 10 o’clock this morning. Because she ___ go to work.
• Many students in Turkey ___ wear uniform when they go to school.
• I’m sorry I couldn’t come yesterday. I ___ work late.
• You’ve been coughing a lot recently. You ___ smoke so much.
• You have a bad headache. So you ___ go to bed early.
• I can’t swim very far these days but ten years ago I ___ swim from one side of the lake to the other.
• You ___ see the sea from our bedroom window.
• It isn’t permitted to speak Turkish during the lessons. So you ___ speak Turkish.