It's high time you had your hair cut; it's getting _____. [ ]

A. too much long

B. much too long 

C. long too much

D. too long much

（）是由于围岩的塑性变形和破裂，围岩向巷道空间位移，使支护结构受到的压力，是变形围岩压力的主要形式。