Exercise 4.
Complete the sentences use the modal verbs can, may or must:
0. She must still live in Paris.
 
1. He is busy. He … be writing a book about his travels.
2. But he is happy. He … enjoy it.
3. I … come and see you tomorrow if I have time.
4. What time is it? – It … be about six  o`clock, but I am not sure.
5. Only a person who knows the language very well … answer such a question.
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