问题补充:
He is considered the work ahead of time.
A. finishing
B. to finish
C. having finished
D. to have finished
答案:
A. finishing
B. to finish
C. having finished
(答案→)D. to have finished
解析:考查consider的用法。consider意为“考虑”时,后加doing;意为“认为”时,后加to do sth.。句意“他被认为已经提前完成工作了。”finish发生在consider前面,故用完成时。故选D。