问题
选择题
We're leaving at six o'clock ,and hope_________ most of the journey by lunch
time.
A．to do
B．to have done
C．to make
D．to have made
答案
答案：B
B不定式的完成时用来表示这个动作发生在谓语动作之前，或是表示该动作的完成。本题中不定式的完成时表示的正是该动作的完成，因此这句话可改写为：We're leaving at six o'clock，and hope that we will have done most the iourney bv lunch time．