the island country had fought against the invaders for morethan 10 years ___it became independent republic选when还是before
问题描述：
the island country had fought against the invaders for more
than 10 years ___it became independent republic
选when还是before
答
before 在此之间,一直战斗,因为用的是had fought against 完成时.
所以不能用when.