—Who do you think will get the first prize?
—Mary, of course. She ________ for the competition for months.
| A．is preparing | B．was preparing |
C．has been preparing | D．had been preparing |
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—Who do you think will get the first prize?
—Mary, of course. She ________ for the competition for months.
| A．is preparing | B．was preparing |
C．has been preparing | D．had been preparing |
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