the boy to school he was nine years old .的地方填什么 a,went,until b didn`t go,untilc won`t ,until d didn`t,until
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theboytoschoolhewasnineyearsold.的地方填什么a,went,untilbdidn`tgo,untilcwon`t,untilddidn`t,untiltheboytosc
the boy to school he was nine years old .的地方填什么 a,went,until b didn`t go,untilc won`t ,until d didn`t,until
the boy to school he was nine years old .的地方填什么 a,went,until b didn`t go,until
c won`t ,until d didn`t,until
the boy to school he was nine years old .的地方填什么 a,went,until b didn`t go,untilc won`t ,until d didn`t,until
b didn`t go,until
B
not....until------直到......才.......,所以A舍去
C和B没有动词，舍去
B