Question

If you live in the United States, you’re almost 1.(certain) seen at American crow(乌鸦). Crows range from southern Canada throughout the United States. As2.adult, this bird is entirely black from bill to tail, except for its brown eyes. These3.(noise) birds are often recognizable by their special, loud cry, called a caw. There are often mistaken4.the common raven(渡鸦),but ravens are5.(large), and they have differently shaped bills and pointed wings and tails.

American crows often live family groups. Both members of a breeding pair help build the nests, and the female crow usually6.(lay) four or live eggs in spring or summer. After about five weeks in the nests, the young birds begin learning how to fly and catch prey. Crows sometimes stay near the spot7.they were born to help raise other young crows.

Crows will eat almost anything, from insects and small animals such as frogs fruit and nuts. They prefer open areas with access to trees and they can sometimes 8.(find)around vegetable gardens. Crows also frequently live in suburban9.(neighbor) and in parks. Crows are considered 10.(be)very intelligent birds.

Answer

1.certainly

2.an

3.noisy

4.for

5.larger

6.lays

7.where

8.be found

9.neighborhoods

10.to be

【解析】本文是一篇记叙文。主要介绍了美洲乌鸦的特征、习性以及和渡鸦的区别。

1.“If you live in the United States, you’re almost ___1___(certain) seen at American crow(乌鸦).” 句子结构完整，不缺少成分，seen为动词，应用副词修饰动词，故填certainly。

2.“As___2___adult, this bird is entirely black from bill to tail, except for its brown eyes.” as为动词，adult为名词，因此，横线处应使用冠词修饰名词。故填an。

3.“These___3___(noise) birds are often recognizable by their special, loud cry, called a caw.” 句子结构完整，不缺少成分，birds为名词，应用形容词修饰名词，故填noisy。

4.“There are often mistaken___4___the common raven(渡鸦)”根据前文美洲乌鸦特征与后文渡鸦特征存在差异，可推断出美洲乌鸦常被误认为渡鸦。“ be mistaken for…”被误认为… ，故填for。

5.“but ravens are___5___(large),” 由前文可知，该句表示渡鸦与美洲乌鸦两者之间体型的对比关系，所以应该用比较级，所以横线处应该用形容词的比较级形式。故填larger。

6.“Both members of a breeding pair help build the nests, and the female crow usually___6___(lay) four or live eggs in spring or summer.” 主语为the female crow，属于第三人称，usually表通常情况，故填lays。

7.“Crows sometimes stay near the spot___7___they were born to help raise other young crows.” 先行词为spot，表示具体地点，并在从句中做状语，故填where。

8.“They prefer open areas with access to trees and they can sometimes ___8___(find)around vegetable gardens.”they与find之间是被动关系，横线前有情态动词can，所以应该用be+被动语态的形式，故填be found。

9.“Crows also frequently live in suburban____9____(neighbor) and in parks.” and连接两个并列结构。 parks为名词复数，suburban为形容词修饰横线处名词，故填neighborhoods。

10.“Crows are considered ___10___(be)very intelligent birds.” crows与consider之间是被动关系，“ be considered to be…”被认为…，故填to be。