People need to communicate and express their ideas, thoughts and (26) ________ . We are able to do this in different ways, for example, by using our voice, hands, eyes, or by (27) ________ down. But is it only humans that can communicate? Scientists continue to make new discoveries about animals and have found that they also have a strong desire to communicate. They often do this in ways that we do not (28) ________ at all. Let us look at this example.

The lion is one of the most powerful animals and is especially known for its extremely loud roar. However, when a lion roars, it may do so for several (29) ________ . A male lion will roar fiercely to warn other animals to stay away from its territory. Lions are also social animals and prefer to live in groups called prides. A quiet roar by a female or male lion to other (30) ________ of the pride allows the lion to let others know where it is.

26. A. dream B. attitude C. viewpoint D. opinions

27. A. writing B. written C. wrote D. write

28. A. speak B. understand C. think D. chat

29. A. thoughts B. ideas C. reasons D. opinions

30. A. peoples B. groups C. friends D. members
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