先看下面的问句：

Who are you?

I am Tom.

What are you?

I am a student.

Who 问的是姓名，what 问的是身份，职业等。

我们在地球上的身份、地位是由环境决定的。因此应该选 what，而不是 who。

▲我同意曹老师选的答案。分析如下：

本题只能选 what，不可能选 who。因为在现代英语中，只有 what 才可以用作缩合连接代词，相当于“先行词+关系代词”，现在 who 一般不这样用。who引导宾语从句时，它总是含有疑问意味（它本是疑问代词，用于引导特殊疑问句，所以在引导名词性从句时，它也具有疑问意味）。如：

He asked who lived next door. 他问谁住在隔壁。

I don’t know who to turn to. 我不知道向谁求助。

She wondered who had sent the flowers. 她不知道是谁送的花。

但what既可以用作普通的连接代词（具有疑问意味），也可以用作缩合连接代词（有的语法书称之为关系代词型what），此时不具有疑问意味。比较：

I asked what he liked. 我问他喜欢什么。(what=普通连接代词；句中“什么”含有疑问意味)

You can eat what you like. 你喜欢什么就可以吃什么。(what=缩合连接代词；虽然也翻译成“什么”，但没有疑问意味)

你的句子意思为：

Environment makes what we are. If we damage the environment, we'll endanger ourselves.

环境会使我们成为什么样的人。 如果我们破坏环境，遭殃的会是我们自己。

▲陈才老师说这是“来自权威英语试卷上题目”，请具体说明一下，这里哪里的权威试题，以便大家进一步时分析时参考！

这道题因为是environment做主语，根据语境和个人语感,可以用what we are. 当然如果加上us,就应该用who we are. 我也赞同刘老师的解答。 但我的观点是：Environment makes what we are 和 Environment makes us who we are 都对。用what we are 不要加us.但现代英语多用who we are.在国外网站找到这样两句来佐证。Genes and environment make us who we are. We are what we are.顺便提一句，在现代英语中，人们询问职业不再说What are you? 显得不够斯文，而说What do you do (for a living)?

以上的题目来自下面的权威英语试卷上题目。

1.I would appreciate______ greatly if you could give me a three-day leave.

A. you    B. it        C. that       D. myself

2.--------- Would you mind my using your computer for a while?

--------- ____________.

A. Yes, go ahead         B. Of course, help yourself

C. Absolutely not         D. Sure, but it’s broken down

3. It may rain, but we should go ________.

A. anyway     B. though       C. certainly      D. however

4. After work they______ all their tools and kept them in the cupboard.

A. put on     B. put away        C. put out        D. put up

5. There is more and more doubt ______ the UN resolution aimed at stopping humanitarian crisis in Lybia has been abused.

A. if     B. that        C. /       D. whether

6. Environment makes _____ we are. If we damage the environment, we’ll endanger ourselves.

A. how    B. who        C. what        D. before

7. Such animals as South China tigers are believed _____, for we’ve had no track of them for ages.

A. becoming  extinct         B. to become

C. to have been extinct       D. having been extinct

8.----- I sped along that highway at 160 mph.

------- Oh, my God. You can never do that again. You ______yourself.

A. should kill    B. could kill

C. should have killed      D. could have killed

9. Weeks after the big earthquake in Japan, hundreds of people remained struggling in their ruined homeland, _____ to be rescued.

A. waiting      B. to wait         C. waited       D. being waited

10. Frequently there is so much traffic in the street in the rush hour that you can hardly get _____ even on foot.

A. over      B. through        C. across      D. beyond

11. Lucy ______ volleyball  regularly for many years when she was young.

A. played   B. was playing        C. has played       D. had played

12. You should ______ making promises you can’t keep.

A. prevent     B. allow        C. protect       D. avoid

13. The novel The Adventures of Huckleberry Finn was written by_____.

A. Henry James                B. Mark Twain

C. Harriet  Beecher Stowe       D. O Henry

14.Which of the following English sounds is NOT bilabial?

A. [b]       B. [m]        C. [p]        D. [f]

15.The English word “untouchable” is composed of _______morphemes.

A. two       B. three        C. four        D. five