请教几和英语小问题，各位高手帮忙一下~~

Question

1.是个改错题。Some people waste food when others haven’t enough.麻烦讲一下怎么改，还有原因~
2.是个选择题。
Can you guess------？
A.what is that man？
B.who that man is？
C.whom that man is？
D.who is that man？
3.matter 和fact和reality和situation的区别

Answer 1

1. Some people waste food when others don't have enough.
2. C
3. matter 只是事物的意思，fact就有点强调事实的感觉
这两个词也经常连用，as a matter of fact
reality,是强调现实，不是幻想；situation是状况的意思

Answer 2

2.d