1.The car damaged in the accident can't be used unless ___ completely .
repaired 我知道這里表示被動(dòng),所以用過去分詞.而且我覺得unless后面省略了主語和謂語,這里是否 = it was repaired 還是 it is repaired .還是我的理解有誤?
2.This is one of the means ___ the electricity energy is conducted from one place to another .正解是 by which .能否幫我分析下這里為什么用 by which 而不是 that \ which .
3.“ Put that money somewhere safe ___ it gets stolen ." Mom reminded me .正解是 before .句意該如何理解?“在被偷之前” 覺得不合適 但卻不知道怎么理解好.
感激不盡.