1.worked 2.didn't understand 3.tried, didin't succeed 4.knocked, opened 5.learned, learning 6.didn't read 7.been 8.been 9.red,didin't finish 10.had 11.mended,comed 12.Drowe,falled 13.painted 14.telled,managed 15.didn't invite 16.had 17.flew 18.called
