Most people will tell you that without a cup of coffee in the morning, they cannot function. Coffee is a good drink when consumed in right amount.   【小题1】

Legend says that Kaldi, an Ethiopian, discovered his goats enjoy eating coffee plants. Curious, he tasted the leaves and began to dance around. A passing monk (僧侣) witnessed the scene and took some back to his fellow monks. Later that night, the monks experienced extreme inspiration. 【小题2】Soon Arabia was roasting coffee beans. By 1000 A. D. , Muslims were drinking coffee to stay awake. A merchant from Venice introduced coffee to Europe in 1615. By 1696, the Dutch started growing the coffee bush in Java. By 1723, coffee plants were introduced to the Americas. Today, coffee is the most popular drink in the world.

Caffeine (咖啡因) is the major chemical in coffee. Caffeine poisoning can occur if more than 400 milligrams of caffeine is drunk in a short period, which is about four to five cups of coffee. 【小题3】So it should be avoided before bed.

【小题4】 Studies have shown that it helps cognitive (感知) skills in elderly women. Women who drank three cups of coffee daily scored higher on memory tests than women who drank one cup of coffee.

Large amounts of coffee can cause nervousness, worries and heartburn. However, if mixed with milk, it is fine. 【小题5】The more you drink, the more you depend on it. For some people, just one cup of coffee a day is OK.

Though it is not good for us to expose ourselves to sunlight for too long, allowing ourselves appropriate amount of exposure to sunlight gives us many benefits and affects us in a number of ways.

Without the sun, life would not have developed. It gives us energy and heats our world. The sun gives us light and thus in turn we are able to see the beautiful colors in our world. It makes us feel good when we feel the warmth of its rays on our shoulders. We store the energy from the sun to help build and heat our houses.

Without sunlight we would not be able to survive. Sunlight gives balance. All living things live in a food chain and at the beginning of the food chain comes the plant which absorbs sunlight and transforms light energy into chemical energy, which will then be absorbed by another life to be turned into a new kind of energy and so on.

One of the benefits that we can get from sunlight is that we can receive vitamin D from sunlight. It helps us to keep a healthy body, control the amount of minerals in the body, which is needed to help keep our bones and teeth in good condition and helps to keep a well-balanced mind.

Different places on the earth receive varying degrees of sunlight, which will decide the region’s climate. For example, the farther away it is from the equator (赤道), the sharper the angle (角度) of the sun’s rays that reach it, which means that sunlight coverage will be more spread out, and receive less heat than lower latitude areas nearer the equator.