Here are some useful idioms to know!

https://7edu.us/blog/testprep-5/common-sat-idioms-students-need-to-know-37

https://blog.prepscholar.com/all-the-sat-idioms-you-need-complete-list-and-tips

https://thecollegepanda.com/sat-writing-idioms/

Credits to Melissa K for these.