He concluded his speech with a remark that failure ____the mother of success.
A、musthavelastedB
【句意】本期设计联络会将持续十天才会结束。
【难点】bythetime意指nolaterthanthemomentthatsomethinghappens，常与过去完成时和将来完成时连用。
The old man lives in a village_______, but he never feels________.
______ they are twin sisters, they don ’t look like each other.
I’dliketohavealongholiday,butI’mreallytoobusyto_____thetime.
I am sorry I have no time at present to ____more detail or give you an account of other cities of interest.
All we want to do ______ to find enough water _______the horses.
