Can or Must | Modal Auxiliary Verbs Exercise
Fill in the blanks with can or must. 1. That is ridiculous. You ……………………….. be joking. 2. There is the doorbell. Who ……………………….. it be? 3. It ……………………….. be Susie. She is in Toronto....
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Fill in the blanks with can or must. 1. That is ridiculous. You ……………………….. be joking. 2. There is the doorbell. Who ……………………….. it be? 3. It ……………………….. be Susie. She is in Toronto....