The key answer of exercise 4
The key to exercise solutions in chapter 4 - Modal auxiliary verbs for the textbook New Headway Advanced - Workbook with authors Liz Soars, John Soars and Paul Hancock from Oxford University Press
Question
Read the conversation about 'cold callers' - people who telephone you at home without your permission in order to sell you something. Choose the correct set expression from exercise 3 to complete it.
Answer
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