lost time
                    举一反三
- We must make up for(弥补) lost time. Lost time __________.
 - Lost time is never found again.
 - The period of the Lost Generation was the time from the_________ of _________ War I to the beginning of the __________ ______________.
 - I will have a good time whether I ______. A: win or lose B: won or lost C: had won or lost D: would in or lose
 - The millions of<br/>calculations involved, had they been done by hand, ________ all<br/>practical value by the time they were finished. A: had lost B: would lose C: would have lost D: should have lost
 
