C

      In a rainforest there are tall trees． The top of these trees is called the canopy． Scientists want to learn about the canopy． They want to learn about everything that lives there， but it has not been easy to get to the canopy．

      Meg is an American biologist， ecologist（生态学家）， explorer， writer， educator，and public speaker． Since she knows a lot about trees， she is sometimes called Canopy Meg．Meg has always liked trees． When she was a child，she made tree houses．Now， she has climbed to the top of trees all over the world and done great research， so she has got a

nickname called "Einstein of the treetops"．

      Walkways in the rainforest were Meg's idea．Now， they are used by many people． A walkway is like a bridge that goes between the trees． It is safe and it doesn't harm the trees． A walkway， however， cannot help scientists reach the top．

      One way to reach the top is by a light raft filled with air． It has a huge net （网） on it．A hot air balloon drops the raft onto the trees．Scientists can stand on the raft and look into the trees．

      A tower crane is also a good way to get to the top． It can go above the tree tops． It can go all the way down to the ground， too． Scientists are learning about life in the canopy． They have learned there are millions of insects（昆虫） that are eating leaves in these treetops．

      Meg's job is to keep finding out more． She wants to help find the secrets of treetops．There are still millions of animals that no one has seen． Many of them are in the treetops．

（1）What do scientists go to the treetops for？　　．

A．To build walkways there．

B．To learn about the rainforest．

C．To study living things there．

D．To look at the things far away．

（2）Why is Meg called "Einstein of the treetops"？　　．

A．Because she has always liked trees．

B．Because she made tree houses in her childhood．

C．Because she is an American biologist and explorer．

D．Because she does great scientific research on treetops．

（3）How many ways of getting to the treetops are mentioned in the passage？　　．

A．One．

B．Two．

C．Three．

D．Four．

（4）Which picture does a walkway look like？　　．