1.Although he had stayed in that business for two years,( )h

1.Although he had stayed in that business for two years,( )he still wanted to switch to a differant career.///A.and B.but C.yet D.so
2.If I knew more English,I( )for this position.///A.would apply B.will apply C.may have applied D.will have applied
3.Cars moved very slowly in the 1920s,but they( )more quickly than in the 1910s.///A.were to move B.would move C.did move D.do move
1和3都解决了，就等待第二题的答案解释了！