531.When shall we restart our business?
Not until we _____ our plan.
A.will finish
B.are finishing
C.are to finish
D.have finished
532.For many years,people ________ electric cars.However,making them has been more difficult than predicted.
A.had dreamed of
B.have dreamed of
C.dreamed of
D.dream of
531.答案是D;在状语从句中，经常用一般现在时或现在完成时表示将来。
532.答案是B;根据句意推断此处的梦想从过去到现在，并由此延伸。
