有赚钱的好生意没有:请大虾们来帮我解几道四级英语选择题目

(1)I had just started back for the house to change my clothes_______I heard voices.
A,as B,when c,after Dwhile

(2)If tap water were as dangerous as some people think,_____would be getting sick
A, a lot of more us
B, more a lot of us
C, a lot of us more
D, a lot more of us

(3)A thief who broke into a church was caught because traces of wax,found on his clothes,______from the sort of candles used only in churches.
A,had come ,B,coming ,C,come D,that came

(5)_______in the United states ,St.Louis has now become the 24th largest city.
A,The fourth biggest city it was
B,Once the fourth biggest city
C,Being the fourth biggest city
D,It was once the fourth biggest city

(6)He often sat in a small bar drinking considerable more than__________
A,he was in good health
B,his health was good
C,his good health was
D,was good for his health
请附上解题的原因