Algae(水藻)  are very simple plants. They grow in fresh water or salty water. Seaweed is algae that grow in salty water. Most seaweed is red or brown in color. The Japanese people use this plant from the sea in many ways. From it, they make a food called Kombu. Kombu is seaweed that has been dried, cooked, and pressed together. Then it is dried again and cut into long pieces. The Japanese eat a lot of Kombu and like it very much. Japanese farmers often use seaweed as fertilizer. It makes their plants grow better. Many farmers also find seaweed and make a fine food for their animals. From seaweed the Japanese also get iodine (碘) , which they sell to other countries. Iodine is used in many ways all over the world. It is used in making medicine. It is added to the salt we use at the table. Scientists even use one form of iodine to 'seed clouds' when they want rain to fall. 1. Kombu is a kind of according to the text. A. plant B. medicine C. food D. fertilizer 2. How do we use iodine in our food? A. We add it to water we take to the table. B. We eat it before meal. C. We add it to the soup. D. We add it to the salt we use at the table. 3. The main idea of the story is that . A. the Japanese eat seaweed when they want rain to fall B. Kombu is made into medicine for farmers C. the Japanese use seaweed in many ways D. the Japanese eat a lot of Kombu 4. The text leads us to believe . A. the Japanese feed Kombu to their animals B. algae are plants from the sea C. scientists could probably learn more about seaweed D. seaweed is the only useful algae