---Listen! Kate is singing in the classroom.
----It_____be Kate. She has gone to the Library.
| A．can | B．can’t |
| C．must | D．mustn’t |
---Listen! Kate is singing in the classroom.
----It_____be Kate. She has gone to the Library.
| A．can | B．can’t |
| C．must | D．mustn’t |
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