There was an look on his face when he knew the bad grade of his son.A. worryingB. excitin

问题补充：

There was an look on his face when he knew the bad grade of his son.

A. worrying

B. exciting

C. worried

D. excited

答案：

A. worrying

B. exciting

(答案→)C. worried

D. excited

解析：考查形容词：A. worrying令人担心的， B. exciting令人兴奋的，C. worried担心的，D. excited兴奋的，句意：当他知道儿子的差成绩的时候，脸上有担心的表情，修饰人的表情用过去分词形式的形容词，选C。