1,Only if you put the sun ______ of the other planets in the sky make sense.

1,Only if you put the sun ______ of the other planets in the sky make sense.
A,there are the movements
B,there do the movements
C,are the movements
D,the movements are there
这句话我知道是倒装句,为什么选B不选C?能帮我翻一下这句话么?
2,The comments the expert made ______ stock-market bothered him greatly,______ him not fall asleep all night.
A,be concerned,which made
B,concerned,making
C,concerning,making
D,to be concerning,made
3,In a sports team each player has a clear role,and there are few occasions ______ members are confused or uncertain of their roles.
A,which
B,that
C,when
D,how
答案为什么选C不选B
4,China's new food law provides for a food recall system ______ producers have to stop production if their food isn't up to standards.
A,where
B,that
C,when
D,which
答案为什么选A不选B