根据汉语意思用英语完成句子，将答案写在横线上。他的父母和老师想让他改变态度。
His parents and teachers him his attitude. 你曾经把你的钥匙锁在房间里过吗？
you ever your in the room?老师相信同学们做了一个很好的决定。
The teacher believes the students have a good . 努力学习是很重要的。
Jack enjoys and sunbathing with his friends. （游泳）
There are many online libraries where you can read books for ________, such as the national Online libraries Library of China and Shanghai Library. （免费的）
The app about how to learn Chinese is very popular ________ the foreigners.（在……当中）
Jumping the rope is a kind of full-body exercise and it is great for the ________（大脑）.
No country is safe ________ all countries are safe. （除非）