The postal service is the government agency that handles the mail. Its job is to deliver letters and packages to people and businesses all over the world. Its goal is to see that your mail gets to its destination ..................... possible.

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............. bad weather, the trip will be postponed to next week.

The postal service is the government agency that handles the mail. Its job is ....................... letters and packages to people and businesses all over the world.

Your friend coughs badly only because he is heavy smoker. Worrying about his health, you say:

Can dolphins talk? maybe they can’t talk with words, but they talk with sounds. They show their feeling with sounds. They travel in a group. We call a group of fish a ‘school’. They don’t study, but they travel together. Dolphins are mammals, not fish, but they swim together in a school. Dolphins talk to the other dolphins in the school.

They tell when they are happy or sad or afraid. They say ‘welcome’ when a dolphin comes back to the school. They talk when they play. They make a few sounds above water. They make many more sounds under the water. People cannot hear these sounds because they are very, very high. Scientist make tapes of the sounds and study them.

Sometimes people catch a dolphin for a large aquarium. (An aquarium is a zoo for fish). People can watch the dolphins in a show. Dolphins don’t like to be away from school in aquarium. They are sad and lonely. There are many stories about dolphins. They say that dolphins bring good luck. Many people believe this.

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Scientist study ........................ of dolphins.