Question

  I stood there patiently until he ________ his work.

A．has finished

B．would finish

C．had finished

D．finishes

Answer 1

C

考查时态，句意：我耐心的站在那儿知道他完成了他的作业。结合语境可知从句动作为过去已经完成的动作，故用过去完成时态。选C。