1. Harry started school __ the age of five. 2. They have a holiday __ Christmas. 3. There is a holiday __ the summer , too. 4. The teachers __ the school are very young. 5. Dan goes __ a secondary school. 6. He ell probably pass __ good marks. 7. Betty is a teacher __ English. 8. Her pupils are __ 12 and 18. 9. She is very strict __ them. from , in , between , of , at , to , on . надо подставить вот эти предлоги помогите плиз