急急急，请哪位英语高手帮忙翻译一下下面的句子，汉译英,不要机器翻译的，帮忙翻译准确点，在线等，谢谢!

1.The headmaster checked the classroom again to make sure no student remains there.
2.The team leader firmly round enverybody's waist with a rope bofore beginning to climb the mountain.
3.Why don't you join this extreme sport ?
4.It requires great courage to do bungee jumping.
5.A excellent idea occurs to Henry.

1. The headmaster had another check in the classroom to make sure no students are staying behind.

2. Before climbing the mountain, the team leader firmly attached a string to everybody's waist.

3. Why don't you participate in this extreme sport?

4. Bungji requires great courage.

5. Henri suddenly came up with a great idea.

1.The headmaster checked the classroom again to make sure there is no student in it.
2. The team leader fastened a rope on everyone's waist before climbing mountain.
3.Why don't join this Extreme Sports ?
4.Bungee needs great courage.
5.