he worked very hard,---he failed 1.or 2.yet 3.and 4.so
问题描述：
he worked very hard,---he failed 1.or 2.yet 3.and 4.so
答
选yet,相当于but,然而的意思
he worked very hard,---he failed 1.or 2.yet 3.and 4.so
选yet,相当于but,然而的意思