一、用括号内所给词的适当形式填空。
1. A good learner always has clear (goal) and keeps learning.
2. (hopeful), each student can make time to take an active part in after-school activities.
3. We (explore) the countryside on bikes during last holiday.
4. If salt is spread onto the ice, the (freeze) temperature will be lower than 0℃.
5. The (art) created a beautiful painting last night.

1. goals 2. Hopefully 3. explored
4. freezing 5. artist

二、根据汉语意思完成句子,每空填一词。
1. 老鼠咬穿了网。
The mouse the net.
2. 当杂志每个月出版的时候,我就购买一些。
I buy the magazines when they each month.
3. 事实上,只要你善于发现,生活就充满了欢乐和幸运。
In fact, life joy and luck as long as you are good at finding.
4. 这位老人无法下车,因为他受了重伤。
The old man couldn’t of the car because he was badly hurt.
5. 他们和其他人一起排队了,没有插队。
They waited in line with other people, and didn’t .
6. 老师说她将在校长的桌子上留个便条。
The teacher says that she will on the headmaster’s desk.

1. bit through 2. come out 3. is full of
4. get out 5. jump the queue 6. leave a message

三、阅读理解。
Do you 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 fish give birth in warm water and move to cold water to feed. The most famous migration（迁移）is probably the migration of the 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 mice. 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, scientists have studied the migration of a kind of lobsters（龙虾）. 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. enjoy warmer weather
C. find food more easily D. find beautiful places
()2. The fish called "salmon" spends a long time in .
A. salt water B. rivers
C. fresh water D. its birthplace
()3. The mice in Northern Europe move when .
A. they give birth B. the weather is bad
C. the place gets too crowded D. they haven't enough food
()4. The lobsters move .
A. to the fresh water B. to the seaside
C. to the salt water D. at a certain time
()5. What is the main idea of the passage?
A. Animals move in order to find food more easily.
B. The migration of the fish called "salmon" is the most famous migration.
C. Living things move from one place to another because they like to travel.
D. Sometimes we know why and how living things move from one place to another, but sometimes we don't.

1-5 CACDD

1. 定位原文第一段内容"Most of them move to find food more easily"，可知大多数动物在固定时间迁徙是为了更容易获取食物，对应C选项。
2. 定位原文第三段内容"This fish is born in fresh water but it travels many miles to salt water. There it spends its life."，可知被叫做鲑鱼（salmon）的这类鱼，一生中很长时间都在咸水里度过，对应A选项。
3. 定位原文第三段内容"In Northern Europe, there is a kind of mice. They leave their mountain homes when they become too crowded."，可知北欧的这类老鼠是在栖息地变得过于拥挤的时候才迁徙，对应C选项。
4. 定位原文第四段内容"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."，可知龙虾每年都会在坏天气到来的固定时节开始迁徙，也就是在特定时间迁徙，其余选项文中均没有相关表述，对应D选项。
5. 通读全文，文章最后一段直接点明主旨：我们有时候清楚生物迁徙的原因和方式，有时候并不清楚，对应D选项。