A：沒錯，這句是假設語氣。在英文中，表示主觀認為不該如此，而非敘述事實，要用假設語氣，其句型為 It’s + 形容詞 (+ that) + 主詞 + should + 原形動詞 (表示現在或未來) 或 should + have + 過去分詞 (表示過去)；should 在句中意為「居然，竟然」。例如：
- It is surprising (that) Jerry should be so polite today. (真想不到傑瑞今天竟然這麼有禮貌) (正)
It is surprising (that) Jerry would be so polite today. (誤)
It is surprising (that) Jerry was so polite today. (誤) - It is very strange that Tom should be so quiet today. (很奇怪，湯姆今天居然如此安靜)