Perhaps most of us are familiar with the saying “Laugh and the world 31 with you, weep and you weep alone.”32 did you know that according to recent research, people are losing the art of laughter and it could have a 33 effect on our health?
答案：(B) But
前面講大家熟悉的諺語，這句話語氣一轉，「但是你知道嗎，根據最近研究……」，But 符合這個轉折；How／So／When 都不符合這個轉折語氣。
本題大考中心未公布逐題答對率，以下不談數據，只談觀念。
空格後面是 did you know（倒裝的疑問句形式），所以你可能會覺得空格要放一個疑問詞，於是 How 或 When 看起來很順。但這一句真正的重點不是在問什麼，是在轉語氣。
先看前後兩句的關係。前一句說 most of us are familiar with the saying（我們大多數人都熟悉這句諺語）——講的是大家已經知道的事。本句是 ___ did you know that according to recent research, people are losing the art of laughter（……你知道根據最近的研究，人們正在失去笑的能力嗎）——講的是大家不知道的新資訊。從「你已經知道的」轉到「但你不知道的」，這是轉折，填 But。But did you know ...? 是英文裡很常見的寫法，用來把讀者從熟悉的東西帶到一個意外的事實上。
How（如何）：How did you know 是「你怎麼知道的」，問的是消息來源，與整段要介紹研究發現的目的完全不合。When（何時）：問時間，同樣不合。So（所以）：因果。「大家熟悉這句諺語，所以你知道研究發現嗎」——熟悉諺語不是知道研究的原因，中間沒有因果關係。
But did you know …?（但你知道……嗎）、according to（根據）、recent research（最近的研究）、the art of（……的藝術、……的本事）、a new finding（新發現）、lose the art of（失去……的本事）。
Perhaps most of us are familiar with the saying "Laugh and the world 31 with you, weep and you weep alone."32 did you know that according to recent research, people are losing the art of laughter and it could have a 33 effect on our health? In 1930 we laughed on average for 19 minutes each day, but by 1980 it 34 to six minutes. Children, 35 , can see the funny side of things more often and may laugh up to 400 times a day.
By exhaling air from the lungs in short 36 of laughter, breathing is quickened and heartbeats increased, which achieves 37 good as ten minutes on an exercise bike. Laughter, too, has a beneficial effect on our immune system, 38 the production of white blood cells and increasing our resistance to infection.39 makes a difference to our appearance, too, when we relax our facial muscles!
Laughter 40 is the best medicine, so why not give yourself a treat? Have a good laugh today--and feel better for it.