No matter what I do my efforts always end in failure.A. lose weightB. to lose weightC. lo

问题补充：

No matter what I do, my efforts always end in failure.

A. lose weight

B. to lose weight

C. losing weight

D. lost weight

答案：

A. lose weight

(答案→)B. to lose weight

C. losing weight

D. lost weight

解析：考查不定式做定语，修饰my efforts，句意：无论我做什么，我减肥的努力最终以失败告终。