题目内容：
根据下面资料，回答题
Last week, when we learned the new word "slovenly", we asked to make a sentence with it. I volunteered to do it by saying "My deskmate is a slovenly girl who clothes never fit her." Hearing this, a whole class burst into laughter and my deskmate face turned red. After class, I learned up from the teacher that my deskmate would have dropped out of school if she hadn′ t been helped with others. My mindless words must have hurt him deeply. Not until then do I realize words could be powerfully in both positive and negative ways. We should avoid hurt others if our words are not encouraging.
答案解析：