Some middle schools in Australia have kept students from car

Some middle schools in Australia have kept students from carrying mobile phones 改同义句
Some middle schools in Australia have kept students from carrying mobile phones
改同义句:Some middle schools in Australia have___students__ carrying mobile phones
用英语翻译两个句子
1,沈阳的平均气温是多少?
2.想一个数字,但不要告诉我它是什么.