Tom has been out of work for two years so he has difficulty. A. earning livingB. earning

问题补充：

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

答案：

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。