_____ the project in time, the staff were working at weekends.

A. Competing
B. Having completed
C. To have completed
D. To complete
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科目：高中英語 來源：同步題 題型：單選題

_____ the project in time, the staff were working at weekends.

[     ]

A. Competing
B. Having completed
C. To have completed
D. To complete

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