答案：B

考查固定搭配和定语从句。we are looking forward to ______是定语从句，先行词是The worse working conditions，把先行词代入定从是we are looking forward to____the worse working conditions_____. looking forward to中，to后用ing形式，所以用seeing。而see+宾语+宾补结构中，宾语the worse working conditions和宾补improve之间是动宾关系，所以用improved。从而选B。