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!

Question

1.校长又检查了一遍教室以确保没有学生留在教室里。2.在登山前，小组长给大家腰上牢牢地系了根绳子。3.你为什么不参加这项极限运动呢？4.蹦极需要极大的勇气。5.亨利突然想到了一个绝妙的主意。

Answer 1

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.

Answer 2

1, The head teacher checked again to ensure (that) there is no students left in the classroom.
2, before climbing, the team leader tight the robe in the waist for everyone.
3, why (you) not join the Extreme Sports?
4, Bungee needs great courage.
5, Henry suddenly got a good idea.

Answer 3

1. The president double checked all classroom to make sure there is no students left there.
2. Before mountaineering, the team leader fix a rope for every menber.
3. Why don't you join this Extreme Sport ?
4. Bungee jumpingneeds big courage.
5. Suddenly, a marvelous idea cone into Herry's mind.

Answer 4

1、 The school master has checked the classroom again to make sure there is no student left in it.
2、 Before climbing the mountain, team leader ties ropes on everyone's waists tight.
3、Why don't you join this highpoint sport?
4、Doing bungee jumping needs great courage.
5、Henry suddenly brainstorms a fantastic idea.

Answer 5

1 The headmaster looked around the classroom again to make sure that no one still stayed.
2 Before climbing the mountain,the team leader tied a rope to everybody's waist.
3 Why didn't you take participate in this extreme sport?
4 Bungji requires great courage.
5 Suddenly a excellent idea came up to Henri.