一、根据句意及汉语或首字母提示写出单词。
1. The blue w lives in oceans around the world. It is the largest animal in the world.
2. Many kinds of birds are very good at fooling other animals. This often helps them (生存) in the wild.
3. Human beings have changed the (地球) a lot in many ways.
4. Buffaloes(水牛) are big and strong animals with long (角). They love to stay near water because water helps them stay cool.

1. whale 2. survive 3. earth 4. horns

二、用方框中所给单词或短语的适当形式填空(其中有一个是多余的)。
nature live make sure at risk feed ill
1. Some wild animals are in danger for many reasons, such as and natural disasters.
2. Farmers started to use special plants their animals thousands of years ago.
3. Wild animals are also from microplastic（微塑料） pollution. Since microplastics are too small to be seen, fish may eat them by mistake and become very sick.
4. — What is a smart home?
— I think it is a space with advanced technology.
5. — Sorry, I spelled the word wrong again.
— It's ______ to make mistakes when you begin to learn English. Just keep going.

1. illnesses 2. to feed 3. at risk 4. living 5. natural

三、单项选择。
1. Last year, Tina was ill. During that period of time, she over ten kilos.

A.took
B.made
C.lost
D.got

1. C

2. As middle school students, we should do everything we can the environment.

A.to protect
B.protecting
C.protect
D.protected

2. A

3. Sometimes I can't my teachers' expectations. In other words, I let them down.

A.live up to
B.come up with
C.stay away from
D.live mainly on

3. A

4. Take a map with you and you'll find it of great in helping you get around the theme park.

A.effort
B.cost
C.interest
D.use

4. D

5. — We are supposed to recycle paper and bottles. It can help to protect the environment.
— It can save money too.

A.Don't mention it.
B.You'd better not.
C.It's a piece of cake.
D.That's a great point.

5. D

四、（跨生物·海豚）从方框中选择适当的词并用其正确形式填空，使短文通顺、意思完整。
habit look after protect land introduce
Do you know about any animals? Different animals have different living 1. and lifespans. There are water animals and 2. animals in the world. Today let me 3. one of the water animals—dolphins.
In the warm waters near an island, a small group of dolphins comes up for air. The dolphin in the front is Mother Dolphin. Mother Dolphin will 4. Baby Dolphins for a long time. They'll be under Mother Dolphin's 5. until they grow up.
look like sleep communicate good they
Baby Dolphins are very playful. They can swim 6. and love to push their mother softly. They look very happy. After playing so much, they get tired. At night, they 7. just below the surface of the water with Mother Dolphin.
Dolphins may 8. fish, but they aren't really fish. Dolphins have their own underwater language of sounds. They use these sounds 9. with each other.
Dolphins always travel in small groups to protect 10. against their enemies, like the shark. They can live for many years. Some dolphins live up to 35 years in the wild.

1. habits 2. land 3. introduce 4. look after 5. protection 6. well 7. sleep 8. look like 9. to communicate 10. themselves