16．By the time you get to New York, I____________(已经动身去) London.

17. Buying clothes______________________(是一件很耗时的工作), because those clothes that a person likes are rarely the ones that fit him or her.

18. It’s time_____________________(采取措施) about the traffic problem downtown.

19. When I was very young, I was terribly frightened of school, but I soon______________(克服了这种心理).

20. Please don’t stand in the kitchen, you’re________________（挡路了）.

16. shall have left for

17. is often a very time-consuming job

18. something was done/some measures were taken

19. overcame it/got over it

20. in the way