解答：Last summer vacation I took a trip to the eastern Taiwan with my cousin. 1. last summer vacation 是否放前後都可以？ 2. take a trip 和 travel 有什麼差別？ 3. in 和to 在此句的用法及差別。 4. the east of Taiwan (還是the eastern of Taiwan ）一定要用 the eastern Taiwan 嗎？