David was bad at his studies so when I was told he did well in the final exam this time

问题补充：

David was bad at his studies, so when I was told he did well in the final exam this time, I found it really .

A. unbelievable

B. harmful

C. rude

D. fundamental

答案：

(答案→)A. unbelievable

B. harmful

C. rude

D. fundamental

解析：考查形容词：A. unbelievable难以置信的，B. harmful有害的C. rude粗鲁的D. fundamental基本的，句意：大卫学习很差，所以有人告诉我他期末考试考的很好的时候，我感觉很难以置信。选A。