The key answer of exercise 9.2
The key to exercise solutions in chapter Unit 9 - Present perfect continuous for the textbook English Grammar in Use with authors Raymond Murphy from Cambridge University Press
Question
Write a question for each situation.
Answer
- Have you been swimming?
- Have you been waiting long?
- What have you been doing?
- How long have you been working there?
- How long have you been selling mobile phones?
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