Ex1: rewrite the sentences using the words given
1. you are expecting david to ring. the phone rings(must)
2. Anna is a better runner than Rula. you think Anna will probably win the race tomorrow(should)
3. a letter arrives. it is possible that it is from your cousin Janice(could)
4. there is a knock at the door. your mum says ít might be Colin, but you know Colin is on holiday(can't)
5. you see someone wearing a costume. you think there is a strong probability that she is going to a fancy-dress party(must)
6. your sister is looking for her hairbrush. you think it is possible that it is in the living room(might)
7. you are waiting for Harriet to arrive. you think she will probably be there in half an hour(should)
8. you are talking about why James seems to be sad. you think it is possible he is in trouble at school(could)
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