Question

【题目】 —Why were the workers so happy?

—Because they ___________ a new oilfield(油田) in the area last week.

A. invented B. helped C. discovered

Answer 1

【答案】C

【解析】句意：——工人们为什么这么高兴？——因为他们上周在这个地区发现了一个新油田。A. invented发明，创新；B. helped帮助； C. discovered发现。结合句意和选项可知选C。