If you are lucky enough，you may find the hummingbird，the smallest bird of the
animal world。in a South American forest.
Though the hummingbird is no bigger than a bee and weighs only 2 t0 3 grams，it can fly as fast as 50 meters in a second.It can fly forwards as most birds do，and it can fly backwards as well.The strangest thing about it，however，is that it can stay still in the air，just like a helicopter(直升飞机).
Whenever a hummingbird needs food，it will fly slowly towards a flower.It wont’ t stand on the flowers，as bees would，but just hangs t0 the flower and then begins to suck the honey from inside the flower with its needle—like beak(喙).
The hummingbird is very particular in designing and building its nest. It takes
great trouble to choose materials，preferring soft ones to hard ones. Its eggs are so small that a common mate box can hold as many as one hundred of them.
56.The passage suggests________
A. people can easily find a hummingbird
B. there are hummingbirds all over the world
C. not many people are lucky enough to see a hummingbird
D. the hummingbird can fly faster than any other bird
57.In what a different way does a hummingbird fly from other birds?
A. It can fly as fast as a helicopter.
B. It can keep still in the sky.
C. It can fly backwards.
D. Both B and C。
58. Which of the following will a hummingbird choose to build its nest?
A.cotton B.earth C.wood D.stone
59.We can learn from this passage that______.
A. a hummingbird has few feathers in its wings
B. the hummingbird mainly lies on flowers
C. the hummingbird can finish building its nest within
D. the beak of the hummingbird is probably short and