Using empirical data from laboratory experiments 28 observations of a mid-sized Japanese bank in real life, researchers find that weather conditions indeed influence a worker’s focus.
答案：(B) as well as
as well as 用來連接兩個並列的成分，意為「以及」：研究者同時使用實驗室的實證資料與對一家日本中型銀行的實地觀察；out of（出自）、in case of（萬一）、due to（由於）都是表原因或來源的片語，無法並列兩個名詞組。
答對率 36%。
as well as 你記的中文大概是「也」，聽起來像副詞；其實它在句中的功能等同 and，用來把兩個對等的成分接起來，譯成「以及」更準。本句把兩種資料來源並列：實驗室的實證資料，以及對一家日本中型銀行的實地觀察。
空格前是 data from laboratory experiments，空格後是 observations of a mid-sized Japanese bank，兩邊都是名詞組、地位相同，所以要找的是連接用的字，不是表原因、整組當一個介系詞用的那一型。
and 是兩者平起平坐；as well as 是 A 為主、B 為輔，重心在 A。由此延伸出一條常考規則：動詞跟著前面那個主詞走。The president, as well as her assistants, is coming today.（動詞用 is，主角是總統）；換成 and 就變成 The president and her assistants are coming today.（用 are）。along with、together with、in addition to 也一樣，都不改變主詞單複數。
out of（出自）、in case of（萬一）、due to（由於）都表原因或來源，接不起兩個並列的名詞組。
A as well as B（A 以及 B，重心在 A）、not only A but also B（不僅 A 而且 B）、along with（連同）、together with（連同）、in addition to（除…之外還有）。
Research has proven that weather plays a part in our moods: Warmer temperatures and exposure to sunshine increase positive thinking, whereas cold, rainy days bring anxiety and fatigue. 26 , many people believe that bad weather can reduce productivity and efficiency.
There is, however, a significant 27 between such beliefs and the actual effect of weather on people's performance at work. Using empirical data from laboratory experiments 28 observations of a mid-sized Japanese bank in real life, researchers find that weather conditions indeed influence a worker's focus. When the weather is bad, individuals tend to focus more on their work rather than thinking about activities they could 29 outside of work. But photos showing outdoor activities, such as sailing on a sunny day or walking in the woods, can greatly distract workers and thus 30 their productivity.
The findings conclude that workers are actually most productive when the weather is lousy—and only if nothing reminds them of good weather.