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。
Oneoftherequirementsforafireisthatthematerial____toitsburningtemperature.
Mr.Greenisusedto_________twoapplesafterluncheveryday.
As____clearfromhismanners,heisateacher.
Physicsisthepresentdayequivalentof____usedtobecallednaturalphilosophy,from____mostofpresentdaysciencearose.
It’simportant_____aforeignlanguage
