几道英语单选题,帮帮忙~~~

几道英语单选题,帮帮忙~~~
1.Mr.Yang ____ from the burning building, but he lost his life to save the two children.
A.could escape
B.must escape
C.could have escape
D.must have escape
2.The recent five years have seen many great changes ___ in my hometown.
A.took place
B.taking place
C.taken place
D.being taken place
3.As a student, you shouldn't be too ____ about your clothes.
A.unusual
B.special
C.regular
D.particular
4.扑灭火中的扑灭除了用put out 还能用什么?
a.break down
b.put away
c.put up
d.break up