Hummingbirds are birds from the Americas． They are among the smallest of birds． They get their name from the humming sound they make as they fly．
    Hummingbirds live mostly on nectar （花蜜）， a kind of sugar water found deep inside flowers． Drinking nectar almost all day long gives hummingbirds the energy they need to keep their wings beating fast， typically around 3，000 times a minute． Hummingbirds' hearts beat fast too， up to 1，260 times a minute （yours beats about 70）． And they breathe （呼吸） about 250 times a minute． So they need a lot of energy． This means that hummingbirds need to eat almost all day long． 它们从一朵花飞到另一朵，很少休息．
    As a hummingbird feeds， its beak （鸟嘴） and face get covered in pollen （花粉）． When the bird visits another flower， some pollen falls off． Hummingbirds help the flowers by spreading pollen around from plant to plant． It's a fair trade： the hummingbird gets a meal and the plant gets to make seeds （种子）．
    For humans， eating sugar all day would lead to serious health problems． Our bodies could not deal with that much sugar． But hummingbirds burn their sugar as quickly as they eat it， so it doesn't become a problem．
    In fact， hummingbirds don't live on nectar alone． They also eat a lot of insects and spiders． And maybe with enough nectar， the spiders don't taste quite so bad．

（1）回答问题：
Do hummingbirds get their name from their singing voice？

No， they don't．

No， they don't．

（2）将文中划线的汉语句子译成英语．

They fly from one flower to another and seldom rest．

They fly from one flower to another and seldom rest．

（3）回答问题：
How do hummingbirds help the plants to make seeds？

By spreading pollen around from plant to plant．

By spreading pollen around from plant to plant．

（4）将文中划线的英语句子译成汉语．

对人类来说，整天吃糖会引起严重的健康问题．

对人类来说，整天吃糖会引起严重的健康问题．

（5）回答问题：
What does the underlined word "it" refer to？

Eating sugar all day．

Eating sugar all day．