前面用介词in，例如：
1、When it's icy， move off in second.路面有冰时，起步需要挂二挡。
2、Sam is in second grade.萨姆读二年级。
3、Almost every employee must moonlight in second jobs simply to subsist.只是为了维持生计，几乎每个职员都要偷偷地做兼职。
second前面用什么介词
second 前面可以用介词，the，如，You are the second one who finished the work .
