________the project in time ,the staff were working at weenkends.

问题描述:

________the project in time ,the staff were working at weenkends.
a,completing b ,having completed c,to have completed d,to complete

D
作目的状语要用不定式
=In order to complete the project in time ,the staff were working at weenkends
为了及时完工,全体职员周末都没休息