--- I'm sure Andrew will win the first prize in the final.
--- I think so. Hefor 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. Hefor it for months.
| A． | is preparing | B． | was preparing |
| C． | had been preparing | D． | has been preparing |
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