Lesson Four, Exercise 1. Complete the words with ai, ay or a_e. Word bank: race, train, today, rain, case, Monday, play. 1) r__n (picture: rain); 2) Mond__ (picture: Monday); 3) r__c__ (picture: race); 4) tr__n (picture: train); 5) tr__ (picture: tray); 6) c__s__ (picture: case).