1UnitUnit 9-109-102345七选五七选五Some animals can be trained to help humans. For example, specially trained dogs help blind people walk around the town safely. Some kinds of monkeys can be taught things too. _1_ The monkeys pick up the phone when it rings, carry shopping bags and do housework.In the wild, animals and humans are not usually friends. _2_ In Africa, the honey- guide bird works with humans to find food. The bird likes to eat the grubs (幼虫) a type of insect that lives inside a beehive (蜂巢,蜂窝).It knows how to find beehives but it cant open them and get the grubs. People like to eat honey, but they arent very good at finding beehives. _3_ The bird flies to a beehive and people follow it. When the people open the beehive and take the honey, they give the grubs to the bird.In Laguna in the south of Brazil, fishermen and dolphins work as a team. The ocean isnt very clean, so the fishermen cant see the fish. _4_ When the dolphins find a large group of fish, they make a noise to tell the fishermen. Then the dolphins push the fish to the beach. The fishermen wait in the water near the beach and catch a lot of fish in their nets. The fishermens nets make it easier for the dolphins to catch fish too. In Laguna, fishermen and dolphins have been working together for many years. _5_ Meanwhile, the dolphins must be happy to help because they teach their babies how to work with the humans!A. So the bird and the people help each other.B. They attack each other for food or something else. C. However, dolphins can find them easily by using sounds.D. In fact, they usually help to get enough food for their babies. E. The fishermen teach their children how to work with the dolphins.F. They can learn how to help people who cant use their arms or legs. G. However, there are a few interesting examples where they can work together.