寻翻译高手!翻译下面一段话成英文

Children of this age have already entered middle schools, and they usually choose bicycles as their main means of transportation.

children in this age should have studied in junior school,and bicycles are mostly used when they go to school

All of this age stage children are already in junior middle school, but they usually choose the bicycle to take their transportation way.

children of this age are aready in the middle school, and they ususally ride to school.