有几道英语题不会做，请各位帮帮忙。谢谢
1、I don't know when the origin of man can date back to.
When the origin of man _____ _____ is not known by me.
2、I planned to go to Europe for my holiday 2 weeds ago,but now I change my mind.
Though I _____ _____ go to Europe for my holiday 2 weeks ago, I decide not to go now.
3、Why are you _____(be) so selfish?All the water has been drunk by you.
4、I'd rather _____(stay) with you.
顺便问一下 I'd 是不是 I would 的缩写？
谢谢啦
参考答案:date from
planned to
being
stay
I\'d 可以是I would的缩写,也可以是I had的缩写