题目内容：

Do you know the differences between African and Asian elephants？African elephants have larger ears，and both male and female African elephants have tusks（象牙）while only male Asian elephants have tusks.

African elephants have very useful trunks！Since they live where it’s always really hot，they get a trunk full of water and spray it on their backs. Then，they do the same thing with dust. The ends of their trunks work like little fingers. They use them to pick berries，grass，and other plants to eat. To drink，African elephants can suck up to two gallons of water in their trunks，then blow it into their mouths. If they sense danger，they use their trunks to make a loud warning sound. They even hug other elephants with their trunks.

Do you know that the closest relative of elephants are manatees（海牛）？They can weigh up to 1，300 pounds and they are good swimmers. If they’re in really shallow water，they use their front flippers（鳍状肢）to walk while they eat sea plants and grasses. Because they are so slow and like warm，shallow water，manatees often get hurt by a part of the boat when the drivers don’t see them.

Manatees are sea mammals like whales and dolphins. They live in water，but they need to breathe air，so they often go to the surface of water. They can stay underwater for up to 15 minutes.

1.From Paragraph 1 we know that＿＿＿＿＿＿.

A. male African elephants have longer tusks than female one

B. African elephants have smaller ears than Asian elephants

C. female Asian elephants don’t have tusks

D. Asian elephants are larger than African elephants

2.What is Paragraph 2 mainly about？

A. The way African elephants drink and eat.

B. How African elephants use their trunks for protection

C. The shape of African elephants’ trunks.

D. The use of African elephants’ trunks.

3.Why do manatees often go to the surface of water？

A. Because they can stay underwater for only 5 minutes.

B. Because they want to watch out for danger.

C. Because they need to breathe air.

D. Because they want to look for food.