Question

【題目】閱讀理解。

We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.

When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration (遷移) is probably the migration of fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.

Recently (近來), scientists have studied the migration of a kind of lobster (龍蝦). Every year, when the season of the bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go. So, sometimes we know why humans and animals move from one place to another, but at other times we don’t. Maybe living things just like to travel.

【1】 Most animals move from one place to another at a certain time to _______.

A. give birth B. find food more easily

C. enjoy warmer weather D. find beautiful places

【2】 The fish called “salmon” spends a long time in ______.

A. fresh water B. rivers

C. salt water D. its birthplace

【3】 The mice in northern Europe move when _______.

A. they give birth B. they haven’t enough food

C. the weather is bad D. the place gets too crowded

【4】 What is the main idea of the passage?

A. Animals move to find food more easily.

B. The migration of the fish called “salmon” is the most famous migration.

C. Sometimes we know why and how living things move from one place to another, but sometimes we don’t.

D. Living things move from one place to another because they like to travel.

Answer 1

【答案】

【1】B

【2】C

【3】D

【4】C

【解析】

試題分析：本文講述了大自然中動物遷徙的現(xiàn)象，并分析了其中的一些原因：為了更容易找到食物、為了不那么擁擠、了為繁殖后代等等。

【1】細節(jié)理解題。題意：大多數(shù)動物在確定的時間從一個地方遷到另一個地方是為了什么？由第一段中的most of them move to find food more easily可知是為了更好地覓食。故選B。

【2】細節(jié)理解題。由文中第二段的：This fish is born in fresh water but it travels many miles to salt water．There it spends its life．可知Salmon出生后要長途旅行到咸水里度過一生。故選C。

【3】細節(jié)理解題。由第二段里的：In northern Europe, there is a kind of mouse．They leave their mountain homes when they become too crowded．可知這種老鼠在太擠時會遷徒。故選D。

【4】主旨大意題。本文講述的是我們知道的及不知道的動物遷徒的原因，故選C。