为什么问题 : "Wèishéme" wèntí : "Why" Questions

Qǐng gēngzhèng ma?
请更正吗？ (请幫我更正qing3bang1wo3geng1zheng4 or 正確嗎?zheng4que4ma1)
Corrections, please?

1) Why are you in China?
Nǐ wèishéme zài zhōngguó

2) Why are you learning Chinese?
Nǐ wèishéme xuéxí zhōngwén?

3) Why are you adopting a child?
Nǐ wèishéme yào shōuyǎng yīgè háizi? (or is adopting Lǐngyǎng?)

(shou1yang3 or ling3yang3 have same meaning. and it is yi2ge)

4) Why do you live in Israel?
Nǐ wèishéme zhù zài Yǐsèliè?

5) Why aren't you working?
Nǐ wèishéme bù gōngzuò?

(you can also say: ni3 wei4she2me mei2you3 zai4 gong1zuo4?) 

Thank you!!
Xièxiè