I think skydiving和to do是用is dangerous还是are dangerous

I think skydiving和to do是用is dangerous还是are dangerous Bungee jumping 和Skydiving Skydiving is said to be an exciting ______,but I am in no hurry to try it.A.experienceB.agreementC.conclusion满分：3 分给讲讲 I should have started skydiving a long time ago I can not but think so.和I have to think so.的区别? think it hard to do 和 i think it's hard to do 有什么区别 i think you need to get more exercise意思和i think you need to do some sports相同吗? I think this question is easy to answer.和I think this question easy to answer.哪个正确? I think to cheat on the exam wrong.和I think to cheat on the exam is wrong.哪个的语法对?I think to cheat on the exam wrong.I think to cheat on the exam is wrong. I think should to cherish I also want to know what I think.和I also want to know what I thinking哪句对. 有没有I think it is necessary to.如果有他和I think it necessary有什么区别? I think i take to you! I think I deserve to have you I think I should learn to say I hate to think anything!Only to Will miss you when I want to 和 Miss you the time Will think I I think you might want to wrong,do you think?