请大伙帮我解释一下这几题为什么选这个答案!103.what is ( )ordered the english book?A the lady's address in beijing whoB the lady's address in beijing whichC the address of the lady in beijing whoD the address of the lady in beijing which104.there comes a time in every man's life ( )A then he has to thinkB which he needsC when he has to thinkD therefore he has to work hard109.this is the shop ( )i often buy foodstuff.A whereB whichC of whichD to which110.the reason ( )he ga

请大伙帮我解释一下这几题为什么选这个答案!
103.what is ( )ordered the english book?
A the lady's address in beijing who
B the lady's address in beijing which
C the address of the lady in beijing who
D the address of the lady in beijing which
104.there comes a time in every man's life ( )
A then he has to think
B which he needs
C when he has to think
D therefore he has to work hard
109.this is the shop ( )i often buy foodstuff.
A where
B which
C of which
D to which
110.the reason ( )he gave for his being late was unacceptable.
A why
B that
C who
D for which
112.those guilty of a serious crime ( )refuse to reform must be severely punished.
A which
B whom
C when
D who
113.yet no firm evidence had come to light ( )the men arrested were actually responsible.
A which
B as
C what
D that
比如103,为什么选C,不选A?特别是109,是介词提前么?