Question

【题目】— What do you think of the math problem?— It's very hard and nobody has __________.
A.put it out
B.helped it out
C.worked it out
D.solve

Answer 1

【答案】C
【解析】句意：你认为这道数学题怎样？它很难，没有人能算出。put out扑灭；help out给与帮助；work out解决；solve解决。解决数学一类的问题，常用work out，而解决困难等常用solve。所以选C。