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The crow (乌鸦) is an ordinary bird. It is black all over. Crows are dirty birds because they live on bad food. Crows eat a lot of waste food. In this way they are more useful to us than any other bird. Crows are always hungry. They look for food all day long and in the evening you can see them in large numbers flying back to their homes in the trees.
Crows are much noisier than other birds. A lot of crows often get together on one house and talk. Sometimes they talk together, and sometimes they do it by turns. It is easy to know if they are happy or angry from crows’ sounds. Perhaps crows talk a lot because they are friendly birds. A couple (夫妇) of crows will live together all their lives, and if one of them dies, the other becomes very sad and quiet for the rest of its life and sometimes dies, too.
1．What colour are crows?They
2．Why are crows more useful to us than any other bird?
Because
3．Do crows look for food all day and all night?
4．How do we know crows are happy or not?
From
5．What may happen if one of the couple dies?
6．Do you like crows? Why or why not?
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
