The reason why people make friends varies.（主句结构为The reason .. varies原因....各不相同）
The reason why he failed the English exam is because he did not learn well.（考查the reason why,另外fail the exam为考试不及格，不达标）
You will come up with different excuses if you hate school.（come up with 想到，想出来 创造出想法 hate school厌恶课业，讨厌学习）
Beijing, the capital of China, is one of the biggest cities in the world.（中国人应该记住这句话）
The question is not when he will come but whether.
Without me, he has no choice but to give up school.（状语从句）
We must take it seriously since there are so many unresolved problems.
Running online shop sounds doable(或者plausible，都表示可行的，行得通的，有搞头的).Let's give it a shot!（give it a shot 尝试，试一试）
应该是要考察你们的从句吧？学习和课业有多种表达方式，不要太中文化哦，老是study啊 learn啊，手打辛苦，请楼主笑纳，有说错的也请指出。
这个不采纳我真到做不到！！！非常感谢！！！
People make friends for kinds of reasons
The reason why he failed in the english exam is that he studied bad
You have many reasons not to take efforts if you don't like study
BeiJing,the capital of China,is one of the biggest city in the world
The question is not when he arrive ,but is whether he come or not
He has no choice but to give up studying without me.
We must take it seriously since there are so many questions.
The idea that we run an online shop sounds good.It's worth to try（worth a shoot）
纯手打，请采纳
追问非常感谢！！
本回答被网友采纳2 The reason for his failure in theexamination is that he didn’t study well.
3 If you dislike study, you will make noefforts with various of reasons.
4 Beijing, the capital of China, is one ofthe biggest cities in the world.
5 The question is not when he will come,but whether he will come or not.
6 Without me, he had nochoices but gave up studying.
7 Since there areso many questions to be solved, we must treat them seriously.
8 It sounds likea good idea to open an online shop, and it is worthy of try.追问
非常感谢
the reason he failed in his English examination is he didn't study well.
if you don't like to study, you will have plenty of reason not to be heardworking.追答
Beijing, the Capitol of China, is one of the largest city in the world.
it's not about when he will arrive, it's about whether he will be coming or not.
he doesn't have any choices than to gives up his study due to lack of money.
since there are plenty of problems we need to solve, then we must solve them seriously.
the idea to run a line shop is not bad, worth a try
1. there are different kinds of reasons people making friends 比较对
追问非常感谢！！！
爸