Rack one's brains; rack one's wits about sth.; task one's mind

例句碰到了這個難題国产免费黄色视频一区二区三区；他～也想不出解決的辦法來。

Today the classroom studies several hundred several dozens adds several hundred several dozens, in the classroom only then my sounds of people rip the strength to use up, speak one's mind, nobody listens to me to teach, below plays respectively each, all is I is putting on a one-man show, this academic society, has not learned, also the surplus many topics have not done, has not completed the task, this hall class has been defeated, was simply forces an analogy, in the book inspected the wrong topic let the student class get down the office to change wrong, the student did not go.

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