问题补充：
. We have finally finished it! When the job if we had started it a week earlier?
A. may we finish
B. could we finish
C. could we have finished
D. may we have finished
答案：
A. may we finish
B. could we finish
(答案→)C. could we have finished
D. may we have finished
解析：可联系答.案.网客服索取。
