Only when _____ how important it was to master English. A.di

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Only when _____ how important it was to master English. A.did i work i realized B.I worked did I
B.I worked did I realize C.did I work did I realize D.I work I realized

答案：B .I worked did I realize
解析：Only + 状语【副词、介词短语或状语从句】位于句首时,主句要用倒装语序【将助动词前提放在主语之前】.如果是“Only + 状语从句”位于句首,主句倒装,从句不到装【你所给试题即属于此类型】
如：1）Only after a bitter struggle was the aim achieved.这个目的只有经过艰苦的斗争才能达到.【only+介词短语】
2）Only so can aggression be checked.只有这样才能阻止侵略.
注意：若Only 位于主语前则不到装.
如：Only Parker can be a match for me them.跟他们较量的人只有帕克.

Only when _____ how important it was to master English. A.di he found it important to master English,中的《it》和《to master E he found it important to master English其中it 和to master Engli Only when I left home ,did i realized how important it was t how important it is to learn English. 71.I _______( 意识到 ) how important it was to learn English at (It )was (only recently )(that) a professor in California di only when___as an interpreter___how important it was to prac 写出原因____ is important for us _____ master computer.A.It;toB. ——important it is to learn English well!A.what B.So C.How D. He found that it was important to learn English well. Only when we came back home,__that my watch was missing.A.di