1. I can’t find my keys. I ______ left them in the car., a) must have, b) might have, c) could have, She didn’t answer the phone. She ______ been asleep., a) may have, b) must have, 3. He looks tired. He ______ stayed up late last night., must have, might have , I have a sore throat.i……, may have, should have, I don’t know where she is, but she was very tired she……gone to bed, may have, should have.

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