– Listen! Sally is singing in that room.
-- It ______ be sally. She has gone to Paris.
| A．may | B．can’t |
| C．might | D．mustn’t |
– Listen! Sally is singing in that room.
-- It ______ be sally. She has gone to Paris.
| A．may | B．can’t |
| C．might | D．mustn’t |
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