—The boy was _____ frightened to see the animals _______ he couldn’t move.      

—In fact, they don’t attack people unless they are cornered.      [ ]

A. too; to  

B. so; that      

C. very; that      

D. such; that

高压氧治疗气性坏疽普遍采用_____疗法，即第一天治疗_____次，第二夫治疗_____次，第三天治疗_____次。治疗压力应取_____MPa。