Complete the sentences with at , in or on . 1 Our departmental meeting is ___ Friday afternoon. 2 I don’t like meetings ____ the morning. 3 The first interview is 17 December. 4 The second interview is ____ January. 5 When he travels all day, he can’t sleep ___ night. 6 She usually visits our head office ___ the autumn. 7 They never work ___ the weekend. 8 Are you free ___ Wednesday? 9 Susan sometimes works ___ Saturdays. 10 Do you often go out ___ the evening? 11 He starts his meeting ___ 8.30. 12 Diane loves reading ___ Thursday evenings.