出自TOEIC相关书籍，想请益以下几个问题解析!!Thanks!!
Don’t ask me. I just have no idea about _____.
A.whose car is this B.whose car this is C.this is whose car
D.whose this car is
疑问：为什么是B而不是A
How many of us would do the same thing ____?
A supposed the chance gives us B only we were given the chance
C if given the chance D by the chance given us
疑问：为什么是C而不是D
____, he simply found a way to discard it and avoid it entirely.
A.He was unable to solve the problem B.Was unable to solve the problem
C.Be unable to solve the problem D.Unable to solve the problem
疑问：为什么是D而不是C