CAN ANIMALS BE MADE TO WORK FOR US？ Can animals be made to work for us？ Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings. The

21. Now many animals can do some simple jobs that are done by human beings.

22. The writer says that 8t a circus we can see animals doing cIever tricks.

23. The trainer usually gives the animal a piece of candy or fruit after it has done the trick.

24. The reward in the passage means "attention paid to a good behavior".

25. Many animals may be trained to do simple jobs if they know who their trainers are.

26. Geese can be used to guard a house.

27. When the pigeon sees a ball which looks different from the others , it makes a noise.

28. Trainer usually spends 40 days or so training a pigeon to inspect sm811 steel balls.

29. An ape is a large monkey.

30. Scientists believe apes may drive buses one day.

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