the project in time the workers were working at weekends.A. CompletingB. Having complete

问题补充：

the project in time, the workers were working at weekends.

A. Completing

B. Having completed

C. To have completed

D. To complete

答案：

A. Completing

B. Having completed

C. To have completed

(答案→)D. To complete

解析：可联系答.案.网客服索取。