3．________(自然) study is the study of plants, insects, and animals, etc.

2．A _______(斑马) is a kind of animal.

1．There are many different _______(种类) of living things on the earth.

9．I often hear him ______(sing) in the next room..

根据汉语完成句子

8．Some people do well in _______(protect) the environment.

7．There are all________(kind) of animals in the zoo.

6．Don’t forget__________(clean) the blackboard.

5．It’s time for class. Let’s stop ________( talk).

4．He _________ ( not see) the film with us last night.

3．We saw a child _______(lie) under the tall tree.