Heconcludedhisspeechwitharemarkthatfailure____themotherofsuccess.
A、musthavelastedB
【句意】本期设计联络会将持续十天才会结束。
【难点】by the time意指no later than the moment that something happens，常与过去完成时和将来完成时连用。
Mrs. White has _____ that she is not able to get a job.
Tom has been a vegetarian ____principle for years .
By local doctors and nurses, we hope more people.
---Wouldyouliketogooutforawalkwithus?
---_____,butImustfinishmyhomeworkfirst.
I am sorry I have no time at present to ____more detail or give you an account of other cities of interest.
