--Is that Anna's car?
--It____be hers. She has just gone to the theater for the new opera.
| A．can't | B．mustn't | C．may | D．could |
--Is that Anna's car?
--It____be hers. She has just gone to the theater for the new opera.
| A．can't | B．mustn't | C．may | D．could |
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