B

Analysis of test questions: B (A. Repeated trials: no mistakes. B. bleak management: bleak: hard work; Management: planning. Refers to the painstaking management and planning in literary creation. After that, it refers to working hard in a certain career in a difficult situation. (not used for poor management) C. Lightweight: It describes foresight, boldness, calmness in the face of difficulties and dangers, and the spirit of staying the same. D. it's hard to count: there are so many sins to describe, even if all the hair is pulled out and counted, it's not enough. )

Comments: To correctly understand the overall meaning of idioms, you should pay attention to the combination and collocation of contexts. The more you want to understand idioms literally, the more you should pay attention to traps. Particularly strange idioms are often correct. We should also pay attention to the scope of idiom use and the object of collocation; Try to find out the relevant information in the sentence to help us judge.