分类：教育/科学-升学入学-高考
问题：thereisnodoubtthatonlybylifelong? 
___the advancing society.A.we can ep up B.can we keep up withC.can we keep up D.we can keep up with
回答：B.only 所修饰的状语（或状语从句）在句首时，主句到装。（only修饰副词、介词短语或状语从句）。Only then did I realize that I was wrong. 直到那时我才意识到我错了。Only in this way can you learn it by heart. 只有这样你才能把它牢记在心。Only in this way can you learn from your mistakes.Only after the country was liberated in 1949 was he able to live a happy life. 只有在解放后，他才过上了幸福。  Only when the war was over in 1918 was he able to get happily back to work.Only修饰主语时不到装：Only Tom knows the secret.keep up with 词组---跟上，赶上