Best way to get idioms down?

<p>I usually get on average 3 writing questions wrong every test (with scores ranging from 750-790) and about 50% of the questions I get wrong regard idioms. </p>

<p>Any tips for these questions? Is it hardcore memorization? </p>

<p>I'm going to be a junior in the coming school year and I'm thinking of taking the test in October/November so any practices/strategies I can implement within that time frame would be helpful.</p>

<p>Usually, any prepositions that sound odd or there is a better alternative you can think of, that phrase is wrong. That’s really the only consistent way.</p>

<p>what I did when I was stuck on the idioms (I was like you, getting mostly idioms, and nothing else wrong) was to just find them in the question and just read them over and over again in my head to “feel” if they were wrong. I had a list of idioms in my head and I would try out all of them in the sentence to see if any of them make it better. By doing this, I got my 800!</p>