Many people have to work on the weekend．Some people do not mind．Other people think it is terrible．
One man thinks that working on the weekend can be dangerous．He is Graham Coates．Mr．Coates worked in an office in Brighton, England．
On Saturday, May 24, 1986, he went to the office to do some work．When he got in the elevator to go home, it stopped between floors．Mr．Coates could not get out of the elevator．He was trapped(困住了)!He started to shout, but no one heard him．Then Mr．Coates remembered that it was a holiday in England．No one was going to come to work until Tuesday!
There was nothing for Mr．Coates to do．He had to wait until one his coworkers came to work and found him．With nothing to eat or drink, Mr．Coates ended up sleeping for most of the time．
Early on Tuesday morning, the vice president of the company came into work and found the elevator was not working．When the elevator was opened, Mr．Coates came out cold, weak, and tired．He had been in the elevator for sixty－two hours!
Now Mr．Coates says,“I only uses elevators if they have telephones in them．”
(1)
Mr
．Coates could not get out of the elevator because ________．
Can we make animals work for us?Some scientists think that one day we can teach animals to do a lot of things for people.They say that in a film or on TV you may see elephants， monkeys，dogs or some other animals doing a lot of things.If you watch carefully，you may find those animals are always given a little food to eat after they have done something.Scientists say that people can teach many different animals to do some easy work if they know they will get something to eat.
We all know elephants can carry large logs(圆木) and dogs can look after houses.And we can even teach animals to work in factories.In America，for example，people use apes(猿) to help make cars.Scientists think that those big monkeys may，one day，drive trains.Now people are trying to let them do something just like man.
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(1)
People can teach animals to do some easy work if __________.
A.the animals have enough food to eat
B.the animals learn they'll get something to eat
C.the animals are as clever as man
D.the animals are big enough
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(2)
At present people are letting elephants do some __________ work.
A.difficult B.heavy C.light D.busy
[ ]
(3)
We can use dogs to __________.
A.drive trains B.help make cars
C.keep the houses safe D.carry logs
[ ]
(4)
Scientists are trying to let big monkeys __________.
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