Hi, Ji-young! ♡♡ I think all kinds of languages are difficult to study. ✔ But English is not too difficult to learn because we can have many opportunities to learn. ✔ English is an international language so we can easily access. ✔ It's up to our time and effort. ✔ 1. I rolled up my sleeves. -> I turned up my sleeves. => Your sentence has a correct grammatical structure, but
this has the correct usage/ expression. 2. I'm sure it'll turn up. ✔ 3. Please turn down the volume. ✔
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