单选题 Scientists say that people can teach many different animals to do some of the work if they know they will get something to eat. We all know elephants can carry large logs and dogs can look after houses. Then we can even teach animals to work in factories. In America, for example, people have used apes to help make cars, and scientists think that those large monkeys may, one day, drive trains. Now people are trying to get them to do some- thing just like man.

单选题 Elephants can do some heavy work because they have enough food to eat.
[A] True
[B] False

单选题 You know we can use dogs to keep the houses safe.
[A] True
[B] False

单选题 Elephants can be taught to work for us.
[A] True
[B] False

单选题 Scientists are trying to make big monkeys drive trains.
[A] True
[B] False