In class the professor the finance project in simple but vivid language to make it easier

问题补充：

In class the professor the finance project in simple but vivid language to make it easier for us to understand.

A. undertook

B. clarified

C. approved

D. spoiled

答案：

A. undertook

(答案→)B. clarified

C. approved

D. spoiled

解析：考查动词辨析：A. undertook承担，B. clarified 阐明，C. approved证明，D. spoiled宠坏，句意：在教室教授用简单但是生动的语言阐述这项经济计划让我们很容易理解。选B。