Elephants are the biggest land animals in the world.There are two kinds of elephants,the Asian elephants and the African elephants.Elephants live in parts of Africa and Asia.All the African elephants have tusks（象牙）but only the male（雄性） Asian elephants have tusks.They use their tusks for digging（挖）and finding food.
Female（雌性） elephants are called cows.They start to have babies when they come to 12 years old and they are pregnant（怀孕的） for 22 months.An elephant can use its tusks to dig for ground water.An adult（成年的）elephant needs to drink around 210 litres（升）of water a day.
Elephants have large,thin ears.Ears help cool them down in hot days.An elephant\’s trunk（象鼻） can grow to be about 2 meters long and can weigh up to 140 kg.Some scientists believe that there are no bones in the elephant\’s trunk.Elephants can swim.They use their trunks to breathe（呼吸）in deep water.
The main（主要的） danger to elephants is from men.As men destroy（破坏）their living places.

（1）How many kinds of elephants are there in the world? ______
A.One.
B.Two.
C.Three.
（2）When can an elephant be a mother? ______
A.At the age of 6.
B.At the age of 10.
C.At the age of 12.
（3）Big ears can help an elephant ______.
A.keep warm
B.keep cool
C.keep safe
（4）What is the main danger to elephants according to the passage? ______
A.Men.
B.Nature（大自然）
C.Lions.