Choose the correct item 1) My brother was late in/for/at 2)

Choose the correct item 1) My brother was late in/for/at 2) We couldn't do the exercise. It was very different/favourite/difficult 3) They will have to miss lessons tomorrow, won't they/have they/will they? 4) I go to chess club once in a/once a/once at week 5) My mum is waiting -/to/for the doctor now 6) You mustn't/must/can gomthere. It's too late. 7) She has to stay with her sister, hasn't she/doesn't she/ does she? 8) Kate, you have a running nose. You can/mustn't/should go to the doctor. 9) Nick has a headache/toothache/cold. He has a temperature andna sore throat. 10) Kate is a good girl. She's friendly and polite/strong/tall. 11) Our classroom is comfortable/the most comfortable/more comfortable than your room. 12) My brother can help me to do/make/have the sum. Помогите пожалуйста!