Нужна в составлении вопросов по .не понимаю.примеры предложений, напишите с объяснением : 1)at school every lesson was 45 minutes(how long) 2)we were at home yesterday(where)

How long was every lesson at school?
where were you yesterday?
 что не понимаете, напишите
разделительный- At school every lesson was 45 minutes, wasn't it? We were at home yesterday, weren't we? 
альтернатива Was every lesson 45 or 40 minutes at school? Were we at school or at home yesterday?

1. Different illnesses will easily be cured by modern medicines.2. Today there is no need to send letters by mail, because there are modern, comfortable gadgets.3. I think, doctors will be able to cure diseases, which are deadly and dangerous.4. Autistic people can use computers as well, because some of these them are even smarter than normal people.5. All schools are well equipped with computers today, because they help student and teachers learn and teach. Я, надеюсь, ничего не напутала? Удачи.

1. Different illnesses will easily be cured by modern medicines.2. Today there is no need to send letters by mail, because there are modern, comfortable gadgets.3. I think, doctors will be able to cure diseases, which are deadly and dangerous.4. Autistic people can use computers as well, because some of these them are even smarter than normal people.5. All schools are well equipped with computers today, because they help student and teachers learn and teach. Я, надеюсь, ничего не напутала? Удачи.