All the students are busy ____ the final examination (期末考試).

A. preparing for
B. preparing
C. to prepare
D. prepare
A
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科目：初中英語 來源：貴州省期末題 題型：單選題

All the students are busy ____ the final examination (期末考試).
[     ]
A. preparing for
B. preparing
C. to prepare
D. prepare

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