A party just isn’t a party without cakes, but do you ever wonder why? Sure, most people like cakes. But 【小题1】 and how did the birthday cake we know today begin?

It is believed that the 【小题2】 birthday cake was made in Germany in the Middle Ages. The Germans would 【小题3】 children’s birthdays with cakes, calling the celebration Kinderfest. At the beginning, cakes were a bread-like product. Later 【小题4】 was made much sweeter, and was called Geburtstagstorte.

In the 17th century birthday cakes were 【小题5】 with more decorations (装饰). However, these 【小题6】 were only enjoyed by wealthy people because of the high-priced ingredients (材料). In the 18th century, food and baking tools became cheaper 【小题7】 easier to get. With that, the price of cakes went 【小题8】 and the production of cakes went up.

While birthday celebrations are 【小题9】 all over the world, there is still something in common in most countries, and eating birthday cakes seems to be one of the most popular ways. So next time when you enjoy a birthday cake, don’t forget 【小题10】 sweet history of it.

Whenever you walk past a cafe，you might be drawn in by the smell of freshly made coffee. But when you try this dark drink，you will regret it，b【小题1】it tastes like biter Chinese medicine.

Why does something s【小题2】so good，but taste so bad？Many people are curious （好奇）about this，but now scientists say they have f 【小题3】 the answer-it lies in our “second sense of smell，"according to the Telegraph.

"We have two senses of smell，" explained Barmy Smith，professor of the University of London. “One is when you breathe in things from the environment，and the o【小题4】 is when the air comes up the nose and is breathed out through the nose. "

When we d【小题5】coffee，for example，the act of swallowing（香）sends a burst of（一阵）smell up the back of our nose from inside the mouth. This w【小题6】 up the second sense of smell in our brain. But it is weaker and less sensitive to flavors（味道）. As a result it gives us a completely d【小题7】feelings.

In fact，the second sense of smell plays a big part in our eating e【小题8】 . It may be common a sense that we smell through our nose and taste using our tongue（舌头）. But the truth is 80 percent of what we think of as taste actually r【小题9】 us through smell. Just hold your nose w【小题10】 eating and you will notice that your tongue can only catch a very small part of the flavor.

The traditional Chinese calendar divides the year into 24 solar terms (节气).

Thousands of years ago, they 【小题1】 (create) to help with farming, but the solar term culture is still very 【小题2】 (use) today to people’s life. Grain Buds is 【小题3】 eighth solar term of a year. It means that the seeds from the grain are becoming full but are not ripe. This year Grain Buds falls   【小题4】 May 21st, and lasts 16 days.