18. 밑줄 친 It[it]이 가리키는 것으로 적절한 것은? [1점] It's not always easy to tell what's it and what's not. 항상 무엇이 옳고 그른지를 분간하는 쉽지는 않습니다. Sometimes, it's accidental--you really intended to do your own work, but instead ended up with some sentences that sound just like something you've read. 가끔, 그것은 우연입니다만--당..