病人王某，47岁，工人，脊髓损伤致腰以下截瘫后1周转入，病人意识清醒，大小便失禁。

为该病人做松弛按摩时可用（）。

A.50％乙醇

B.70％乙醇

C.90％乙醇

D.松节油

E.温水

He ______ full marks, but he was so careless as to make a spelling mistake.[      ]

A. must have gained

B. can have gained

C. could have gained

D. must gain