1) Yes, I'd love to. Canada is a very interesting country, so I'd like to do some sightseeing and also to develop my English skills.
2) As for me I would like to visit as ,many cities of Canada as it is possible, but I think it's important to visit Ottawa - the capital of Canada first of all.
Of course I heard about these world famous cities. Ottawa is a capital of Canada, Toronto is one of the biggest cities in Canada, which was named after the lake Toronto. And Sydney is a city in Australia, where the Olympic games of the year 2000 took place.
3) In my opinion, Canada is a nice place to live. It is a beautiful country. It has the similar climate that we have here, in Russia. The higher education in Canada is also very good and as for me, I'd like to get my professional degree there.
At school we must ..listen to the teacher and ...do well what the teacher says to us and answer the teacher's questions...
We must wear a school uniform at school.
We must 't ..be late for school... and we mustn't miss the lessons...
We mustn't talk to our friends at the lessons and we mustn't run and make noise during the break. We mustn't litter at school.
В школе мы должны слушать учителя и делать хорошо всё то, что говорит учитель, и отвечать на вопросы учителя.
Мы должны носить школьную форму в школе.
Мы не должны опаздывать в школу и мы не должна пропускать уроки...
Мы не должны разговаривать с друзьями на уроке и не должны бегать и шуметь во время перемен. Мы не должны мусорить в школе.
в последнем предложении проверьте , есть ли ошибки. Если - I put ___ (I) over my bed and I ___ (HAVE) a bad dream since., то ставьте - it, have had.
Если там ошибка, то пишите в коментах - я поправлю