Question

--- What do you think of the math problem ?--- It’s very hard and nobody has _______.

Answer 1

答案：C
解析：
试题分析：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。
考点：考查动词短语。