Exercise 1. Change the following affirmative statements into questions. For example: I may go. May I go? We could have found it. Could we have found it? 1. I must leave at four o'clock. 2. He might be leaving for work now. 3. We can solve the puzzle. 4. You should have called him. 5. They could have been waiting for the bus. 6. I shall go out now. 7. You will have finished the book. 8. We should be making the arrangements. 9. She would like to know the answer. 10, They can explain what happened.​

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