单选题 My eyes had become _________ to the now semi-darkness, so I could pick out shapes about seventy-five yards away.
【正确答案】 B
【答案解析】本题考查形容词的含义。A倾向于；B习惯；C脆弱；D敏感。句子的意思是：我的眼睛已经适应了这种半黑暗，可以辨别75码以内的东西。