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Since that time he has ( ) grown weaker and has been able to do less and less.
A、rarely
B、steadily
C、actively
D、probably
【正确答案】：B
【题目解析】：考核词义，rarely 很少，steadily 稳定地，actively 积极地， probably 合适地，句子含义是自从他开始虚弱之后，能做的事情越来越少。