中等ENGL-WRIARG-001
以下邊一句最適合作為一段的 topic sentence？
A. Many students use social media every day.
B. Social media should be taught as part of the school curriculum.✓ 答案
C. Social media was invented in the early 2000s.
D. My cousin is on social media.
解說
Topic sentence 必須是可辯論的主張。A、C、D 都只是描述事實，冇立場可以支持或反駁，所以帶唔起一段論證。B 提出 should，可以接上解釋與例子。