----Have they finished the project?-Yes. By the end of last month they it. Now they

问题补充：

----Have they finished the project?

---- Yes. By the end of last month, they it. Now they on a new one.

A. had finished; are working

B. had finished; work

C. have finished; are working

D. have finished; work

答案：

(答案→)A. had finished; are working

B. had finished; work

C. have finished; are working

D. have finished; work

解析：考查时态，第一空时间是By the end of last month，by+过去时间，要和过去完成时连用，第二空时间是now，用现在进行时，句意：--他们的计划完成了吗？--是，到上个月底为止，他们已经完成了。现在正从事新的计划。选A。