Musical Instruments Musical instruments are essential tools to produce beautiful melodies. Myriad instruments have been born in the long history. According to the different performing methods, musical instruments can be classified into three categories: string instrument, wind instrument and percussion instrument. String instrument is an instrument which produces sound from strings’ vibration. During performance, performers use their fingers or some tools like plectrums to pluck the strings to make sounds. There are many popular string instruments both in China and foreign countries. For example, in western countries, there are guitars, piano, harp and violin. Back in China, we have traditional instruments like Pipa, Guzheng, Yangqin and Erhu. Wind instrument is an instrument which creates sound from the vibration of air in the tubes. Musicians use their lips and tongues to change the flow of air in the instruments in order to produce different keys. Based on materials, wind instrument can be divided into brass instrument and woodwind instrument. Brass like saxophone and trumpet is more popular in western countries while woodwind like Dizi and Xiao is more common in chinses history. Percussion instrument is an instrument which is sounded by being struck. Performers use their bare hand or something like sticks to struck the instruments to produce sound. In foreign countries, especially those in Africa, drums are really popular. And in our own history, we have things like chime bells and Luo. Instruments are the foundation to produce beautiful music. The more we learn from their function, the better we use them.

things about pets Nowadays, more and more people are likely to raise pets. Some people prefer fish like goldfish, and some adore mammals like dogs and cats. While I, personally, have owned two kinds of pets. They are a goldfish and a rabbit.   Fish is a kind of pets that requires just small room to live. You can have several goldfishes in one bowl. Through the transparent glass wall of the bowl, you can see those colorful and lively little fish, with their bubbling mouth and luminous scales, shuttling back and forth in the water. Without annoying noise and making your home dirty, you keep them in a jar, feed them and change water regularly. And these beautiful little creatures can bring you a sensation of joy and calm.   Mammal is a kind of pets that you can have lots of interaction with. Like dogs and cats, they have sounds to respond you and are available to touch and caress. And their fuzzy looks intrigue your desire to protect them. This reminds me my rabbit. Its fur was as white as snow, with its tiny nose and two long flurry ears. When it jumped, it looked like a snow ball rolling forward. Mammal pets are usually really cute.   No matter what pets people like, ranging from mammals to reptiles, pets are always our friends and companions. We should treat them well and love them from our hearts.