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