语法与词汇 Gates Peace Foundation has been _____ to service improvement and customer services sinceit started its donation business.

【正确答案】 B

【答案解析】句意：盖茨和平基金会自开始慈善募捐业务以来，致力于改善服务和顾客服务。be committed to投入；致力于。be able to有能力做某事。be liable to易于……的；应受；有……的可能。be intended to为了；打算；意图是。