Tom has been out of work for two years, so he has difficulty .
A. earning living
B. earning his living
C. to earn livings
D. to earn his living
网友回答
A. earning living
(答案→)B. earning his living
C. to earn livings
D. to earn his living
解析：考查短语：have difficulty (in ) doing sth 在某方面有困难，earn one’s living 谋生，句意：汤姆已经失业两年了，因此他在谋生方面有困难。所以选B。