Elephants are the largest animals on land．For a long time，they are very helpful．They carry big trees，take people from place to place，and are even used in wars．
Some people think it's not easy to hurt an elephant because its skin is thick and．In fact，that's wrong．Sometimes，a needle（针）can also be very dangerous for the elephant．
People say elephants are afraid of mice．This is wrong，too．In fact，elephants have very poor eyesight，so they usually can't see a mouse even if one comes very close to them．If a person has a good memory，people will say that he has an elephant memory．However，up to now，no study shows that elephants have a better memory than any other animal．
People also believe that when it is time for elephants to die，they will hide themselves in a so-called"elephant graveyard"．Often，hunters try to find such places to get ivories（象牙），but few people really find places like that．In fact，when elephants are old or get sick，they will stay in deep and secret caves（洞穴）until they get better or die．

(1) Elephants can help people a lot EXCEPT（除了…） ______ ．

A. to carry heavy trees．

B. to help people build houses．

C. to carry people to different places．

D. to help people fight in the war．

(2) Why do some people think it isn't easy to hurt an elephant？ ______

A. Because the elephant is too big．

B. Because people can't get close to it．

C. Because the elephant can kill people．

D. Because its skin is thick and hand．

(3) What is the possible meaning of the underlined word" graveyard"？ ______

A. A place for hiding dead bodies．

B. A place for animals to play in．

C. A place with yards and flowers．

D. A place where elephants are safe．

(4) What is the main idea of this article？ ______

A. Elephant are man's best friends．

B. Different countries have different elephants．

C. Elephants are the biggest animals on land．

D. Some of our ideas about elephants are not correct．