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。
As the pressure____, the liquid rock is forced up through channels in the resistant rock to the earth’s surface.
The little boy didn’t know_______.
—Howdoyoulikethisdress?
—It’sbeautiful,anditfitsmewell._______Ilikeitverymuch.
Is Tom at school today?No, He ’s at home ______ he has a bad cold.
Mrs. White has _____ that she is not able to get a job.
