Rack one's brains to make sentences

1, this problem is so difficult that Xiaoli racked her brains and didn't come up with a solution.

Even if he racked his brains, it was in vain in the end.

In order to correct my bad habit of procrastination, my mother really racked her brains to find a way.

She racked her brains, but she still couldn't understand the teacher's explanation.

When he met this difficult problem, he racked his brains and couldn't come up with a solution.

6. Fast-tasting group travel, so all tourists rack their brains to design more trips that can penetrate the local culture.

7. How to build this magnificent People's Square? Everyone racked their brains to come up with a good idea.

He racked his brains and finally came up with a plan.

His classmates are racking their brains to solve the problem of elementary algebra.

10 They racked their brains to squeeze us out of this industry.

1 1, the defenders of Stoke City racked their brains to get out of trouble. Robert Huss elbowed Ba Lautner's side and directly knocked him down.

12 He tried his best and racked his brains to write the verdict on half a page of manuscript paper, and then copied it to the other half.