找错误并改正:The students in Canada usually go to middle school at the age of 13 and 14.

问题描述:

找错误并改正:
The students in Canada usually go to middle school at the age of 13 and 14.

and→or

The students at their age of 13 to 14 usually go to middle school in Canada.

The students in Canada usually go to middle school at the age of 13 or 14.