The sensors pick up signals from the person’s blood pressure, pulse, and perspiration. 23 the process of questioning, all the signals are recorded on a single strip of moving paper.
答案：(D) Throughout
語意「在整個詢問過程中」，Throughout（自始至終/整個……期間）符合；Before（之前）、Among（在……之中）、Without（沒有）都不合。
throughout 你腦中多半只有「遍及各地」（throughout the world）這一個意思，不太會想到它也能講時間；再加上 Before 讀起來也順（「問話之前」），答對率因此掉到 42%，是這份克漏字裡最難的一格。
先讀主要子句：all the signals are recorded on a single strip of moving paper（所有訊號都被記錄在一條移動的紙帶上）。訊號要有得記錄，一定是問話「正在進行」的時候 — 問話還沒開始，哪來的訊號？再看下一句 Once the questions are finished, the examiner analyzes the results（問題問完之後，測謊人員分析結果），時間軸講得很明白：先記錄、後分析，而記錄發生在問話期間。劍橋詞典把 throughout 標為 B2，釋義是「在每一個部分，或在整段期間」，它同時管空間和時間；這裡接的是 the process（過程），是一段時間，取的就是「整段期間」這一義。順便把 during 和 throughout 的差別一起釐清：during 是「在那段期間的某個時候」，throughout 是「從頭到尾一整段期間」。本句主詞是 all the signals（所有訊號，一個都不漏），配 throughout 才對味。
Before（在……之前）時間點錯了，問話還沒開始就沒有訊號可記錄。Among（在……之中）後面要接三者以上的複數，例 among the trees（在樹林之中），the process 是單數的「過程」，接不上。Without（沒有）代進去會變成「沒有問話過程，訊號卻被記錄下來」，前後矛盾。
throughout the process（在整個過程中）、throughout the year（一整年）、throughout the world（全世界各地）、during the process（在過程進行中的某個時候）、a strip of paper（一條紙帶）、be recorded on（被記錄在……上）、once + 子句（一旦……就……）。
A polygraph machine, also known as a "lie detector," is a common part of criminal investigations. The instrument is used to measure 21 a person's body reacts to questions. The theory underlying it is that lying is stressful, and that this stress can be measured and recorded on a polygraph machine.
When a person takes a polygraph test, four to six wires, called sensors, are 22 to different parts of his body. The sensors pick up signals from the person's blood pressure, pulse, and perspiration. 23 the process of questioning, all the signals are recorded on a single strip of moving paper. Once the questions are finished, the examiner analyzes the results to determine if the person tested 24 truthful.
Well-trained examiners can usually detect lying with a high degree of 25 when they use a polygraph. However, because different people behave differently when lying, a polygraph test is by no means perfect.