写作：我的快乐秘诀 — 英语选择题
题目
本单元话题是“我的快乐秘诀”。下面哪个句子最适合作为英语作文《My Secret to Happiness》的主题句？A. I like playing computer games late at night. B. Helping others makes me feel happy, so it is my secret to happiness. C. My school bag is blue and heavy. D. There are many books in the library.