Late-Night Drinking　　Coffee lovers beware. Having a quick pick-me-up cup of coffee1 late in the day will play havoc with2 your sleep. As well as being a stimulant, caffeine interrupts the flow of melatonin, the brain hormone that sends people into a sleep.　　In the second phase of the experiment, the researchers woke the volunteers every three hours and asked them to give a urine sample, Shilo measured concentrations of a breakdown product of melatonin. The results suggest that melatonin concentrations in caffeine drinkers were half those in decaf drinkers. In a paper accepted for publication in Sleep Medicine, the researchers suggest6 that caffeine blocks production of the enzyme that drives melatonin production.　　1. The author mentions pick-me-up to indicate that　　B neurohormone can wake us up.　　D decaf is a caffeinated coffee.　　A Caffeine blocks production of the enzyme that stops melatonin production.　　C Caffeine halves the bodys levels of sleep hormone.　　3. What does paragraph 3 mainly discuss?　　B Different findings of Lotan Shilo and a team about caffeine.　　D The proof that the subjects took half an hour to fall asleep.　　A There are more enzymes in decaf drinkers urine sample.　　C Decaf drinkers produce less melatonin.　　5. The author of this passage probably agrees that　　B we should not drink coffee after supper.　　D if we feel sleepy at night, we should go to bed immediately.　　1. C pick-me-up指提神飲料，也就是一種剌激物，在這篇文章里具體指咖啡。所以，答案應選 C。　　3. A第三段涉及的是一個實驗，這個實驗的目的是測試含咖啡因咖啡和脫咖啡因咖啡對睡眠的影響，該段主要談論的是這個實驗的結果。　　5. B 文章的結尾談到， Ohayon建議愛喝咖啡的人午飯后應該換喝脫咖啡因咖啡。另外，整個文章都在探討咖啡因影響睡眠的機理，所以，作者大概會同意晚飯后不應該喝咖啡的說法。選項 A是一個全稱判斷，這等于說所有喜歡喝咖啡的人都比不喝咖啡的人睡覺少。這不一定，因為如果咖啡適量，喝咖啡的時間適當，咖啡不會影響睡眠。所以，作者可能不會同意這種說法。根據文章第二段第二個句子，選項 C是錯的。根據文章第二段的第一個句子，我們體內褪黑激素 的濃度在我們上床時間前兩個小時開始上升，而這個時候我們會開始有困意。反過來說就是，人們并非一有困意就睡覺。所以，選項 D不是答案。　　咖啡愛好者注意了。在深夜喝一杯快速提神的咖啡會嚴重影響你的睡眠，跟興奮劑一樣，咖啡因會擾亂褪黑激素的自由流動，這種褪黑激素是大腦里促人睡眠的一種荷爾蒙。　　LotanShilo和Tel Aviv大學Sapir醫學中心的一組人員，在給六位志愿者做試驗時發現，他們在飲了咖啡因的咖啡后比飲了脫咖啡因的咖啡后睡眼質量要差。平均來說，在喝了含咖啡因的咖啡后每晚睡眠時間336分鐘，而喝了脫咖啡因的咖啡后則睡415分鐘。同時他們得花半個小時入睡，是通常情況的兩倍，另外，他們在床上輾轉次數也要長一倍。　　因為要花許多小時的時間才能將身體中的咖啡因除去， Ohayon建議咖啡愛好者應在午后換喝脫咖啡因的咖啡。

　　Late-Night Drinking　　Coffee lovers beware. Having a quick pick-me-up cup of coffee1 late in the day will play havoc with2 your sleep. As well as being a stimulant, caffeine interrupts the flow of melatonin, the brain hormone that sends people into a sleep.　　In the second phase of the experiment, the researchers woke the volunteers every three hours and asked them to give a urine sample, Shilo measured concentrations of a breakdown product of melatonin. The results suggest that melatonin concentrations in caffeine drinkers were half those in decaf drinkers. In a paper accepted for publication in Sleep Medicine, the researchers suggest6 that caffeine blocks production of the enzyme that drives melatonin production.　　1. The author mentions pick-me-up to indicate that　　B neurohormone can wake us up.　　D decaf is a caffeinated coffee.　　A Caffeine blocks production of the enzyme that stops melatonin production.　　C Caffeine halves the bodys levels of sleep hormone.　　3. What does paragraph 3 mainly discuss?　　B Different findings of Lotan Shilo and a team about caffeine.　　D The proof that the subjects took half an hour to fall asleep.　　A There are more enzymes in decaf drinkers urine sample.　　C Decaf drinkers produce less melatonin.　　5. The author of this passage probably agrees that　　B we should not drink coffee after supper.　　D if we feel sleepy at night, we should go to bed immediately.　　1. C pick-me-up指提神飲料，也就是一種剌激物，在這篇文章里具體指咖啡。所以，答案應選 C。　　3. A第三段涉及的是一個實驗，這個實驗的目的是測試含咖啡因咖啡和脫咖啡因咖啡對睡眠的影響，該段主要談論的是這個實驗的結果。　　5. B 文章的結尾談到， Ohayon建議愛喝咖啡的人午飯后應該換喝脫咖啡因咖啡。另外，整個文章都在探討咖啡因影響睡眠的機理，所以，作者大概會同意晚飯后不應該喝咖啡的說法。選項 A是一個全稱判斷，這等于說所有喜歡喝咖啡的人都比不喝咖啡的人睡覺少。這不一定，因為如果咖啡適量，喝咖啡的時間適當，咖啡不會影響睡眠。所以，作者可能不會同意這種說法。根據文章第二段第二個句子，選項 C是錯的。根據文章第二段的第一個句子，我們體內褪黑激素 的濃度在我們上床時間前兩個小時開始上升，而這個時候我們會開始有困意。反過來說就是，人們并非一有困意就睡覺。所以，選項 D不是答案。　　咖啡愛好者注意了。在深夜喝一杯快速提神的咖啡會嚴重影響你的睡眠，跟興奮劑一樣，咖啡因會擾亂褪黑激素的自由流動，這種褪黑激素是大腦里促人睡眠的一種荷爾蒙。　　LotanShilo和Tel Aviv大學Sapir醫學中心的一組人員，在給六位志愿者做試驗時發現，他們在飲了咖啡因的咖啡后比飲了脫咖啡因的咖啡后睡眼質量要差。平均來說，在喝了含咖啡因的咖啡后每晚睡眠時間336分鐘，而喝了脫咖啡因的咖啡后則睡415分鐘。同時他們得花半個小時入睡，是通常情況的兩倍，另外，他們在床上輾轉次數也要長一倍。　　因為要花許多小時的時間才能將身體中的咖啡因除去， Ohayon建議咖啡愛好者應在午后換喝脫咖啡因的咖啡。