一般that 远指,或指代上文 this近指,或指代下文 再问: 那问一个问题 — You come from England, don't you? — ______ How do you know that? A. No, I do B. No, I don't C. Yes, l am D. Yes, I do 再答: D。 that 指上文所提之事 再问: 如果that改为this呢 再答: then it is not correct 再问: why…… 再答: 因为this指下文啊,下文不是还没有吗