题文
— I’m sure Andrew will win the first prize in the final.
— I think so. He ______ for it for months.
| A．is preparing | B．was preparing |
| C．had been preparing | D．has been preparing |
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— I’m sure Andrew will win the first prize in the final.
— I think so. He ______ for it for months.
| A．is preparing | B．was preparing |
| C．had been preparing | D．has been preparing |
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