citizenship by naturalization是什么意思

the changing citizenship of celebraties
这句话的意思..和写出关于这句话的300字左右的英语作文

急问,英文表格中country of citizenship要怎么填啊
是不是要填在***的***身份?

Dear Applicant
We have receied from Citizenship and Immingration Services(CIS)the immigrant visa petition that was filed on you behalf.Before we can process your case ,you must provide certain essential information.
please be advised that you may have the option to reocess your case deectronically.This option is being provided to a limited number of Embassies/Consulates at this time.please go to WWW.immigrantVisas.state.gov to see if you are eligible to participate.If you are eligible,you must follow the instructions outlined on this vebsite.(All documentation must be submitted electronically via e-mail as referenced on the vebsite.) If you are not elingble or do notchoose to process electonically at this time ,please follow theinstructions as outlined below.
1.Complete the Choice of Agent and Address form included with this message.
This from tells us how to contact you during your immigrant visa processing .Your agent can be your petitioner,another relative,a friend ,an attorney ,or a charitable organization,such as a church or other immigrant assistance organization.Mail delivery is often unreliable in many parts of the world,so we storngly recommend that you choose someone who has an address in the United States.
尛晴晴 13:06:03
If you wish to name an agent to receive you mail,please give the name and address of that person in the spaces provided on the included form.
If you do not wish to name an agent and want us to contact you directly,please chech the box that says that you do nto appoint an agent or attorney to receive letters on your behalf ,and write your own adderss on the lines below that box on the form.
If your intention is to adjust status with Citizen and Immigration Services (CIS),please notify this office before taking further action.
If your intention is to adjust status with Citizen and Immigration Services (CIS),please notify this office before taking further action.
2.Send your chice of Agent and Address form to the National Visa Center at this address:
National Visa Center ATTN:ACL 31 Rochester Avenue,Suite 200 Portsmouth,NH03801-2909 United States of America
Be sure the envelope has enough postage for delivery to the U.S.
Until we receive this this form from you,we cannot process your case.
不知道什么来的,帮我翻译一下.

国籍要用形容词还是名词?
在填表,里面有一项：country of current citizenship（现有国籍）,应该填China还是Chinese?
还有一项、Identity number（身份证识别码）.是在身份证上还是在护照上?究竟是什么?