A
The skin of a small fish from Thailand is almost completely clear. As it swims, its muscles move, 1 (result) in reflections of many colors. After shining different kinds of light and lasers onto the fish in a laboratory, researchers made a 2 (discover) that the small structures in its muscles are what turns light into rainbow colors. Other creatures can also create the rainbow effect when colors change. Usually, they have outer surfaces 3 reflect the light, like a butterfly’s wings.
B
With exciting moves, fantastic music and competitors using cool names, breaking is a sport like no other. Also 4 (know) as breakdancing, it will become one of the Olympic sports 5 the Games are held in 2024. It is not yet known how the 2024 Olympic contest 6 (arrange). It is likely that there will be separate female and male battles, and possibly mixed-doubles events with both men and women.
C
As one of China’s ten 7 (famous) teas, Longjing tea is characterized by its green color, delicate smell, rich taste and beautiful shape. The beautiful forms of a bud (嫩芽) 8 one leaf or two leaves are acknowledged as quality tea. The picking work of such tea leaves demands a high accuracy and 9 (depend) largely on hand labor. To improve efficiency, a tea-picking robot was made and it is in trial operation now. It can position 10 the target bud and leaf are and cut them precisely.