[单项选择]

A
Everything living on earth--plants and animals need other living things. Nothing lives alone. Most animals must live in a group, and even a tree or a plant grows close together with others of the same kind. Sometimes one living thing hunts another; one eats and the other is eaten. Each kind of life eats another kind of life in order to live, and together they form a food chain. Some food chains are simple; others are complicated. But all have two things in common--all food chains begin with the sun, and all food chain become broken up if one of the links disappears. All life depends on energy from sunlight. Only plants can use this energy directly. Their leaves are little factories that use sunlight to make food from water and things in the soil and air.
Plants in turn feed all other living things. Animals can only use the sun’s energy after it has been changed into food by plants. Some animals feed directly on plants; others eat smaller animals. Me
A. from water
B. from the air in the sky
C. from the soil
D. from water, things in the soil and air and sunlight

[单项选择]

A
Everything living on earth--plants and animals need other living things. Nothing lives alone. Most animals must live in a group, and even a tree or a plant grows close together with others of the same kind. Sometimes one living thing hunts another; one eats and the other is eaten. Each kind of life eats another kind of life in order to live, and together they form a food chain. Some food chains are simple; others are complicated. But all have two things in common--all food chains begin with the sun, and all food chain become broken up if one of the links disappears. All life depends on energy from sunlight. Only plants can use this energy directly. Their leaves are little factories that use sunlight to make food from water and things in the soil and air.
Plants in turn feed all other living things. Animals can only use the sun’s energy after it has been changed into food by plants. Some animals feed directly on plants; others eat smaller animals. Me
A. Each plant can live alone.
B. Each animal can live alone.
C. Everything living on earth cannot live without needing other living things.
D. If living things want to live they must kill each other.

[单项选择]How does everything living on earth live
A. Each plant can live alone.
B. Each animal can live alone.
C. Everything living on earth cannot live without needing other living things.
D. If living things want to live they must kill each other.

[单项选择]Electronic animals are different from living animals in that ______.
A. they enjoy the company of their owners
B. they like eating snacks and play games
C. they have some simple intelligence of human beings
D. they do not like to be left alone at home

[单项选择]Animals can only survive （　）the living environment is similar to the earth.
A. which
B. whose
C. what
D. where

[单项选择]FAUNA: ANIMALS : :
A. flora: plants
B. vegetation: aboriginals
C. fowl: amphibians
D. livestock: oxen
E. department: professors

[单项选择]What are the ways animals communicate


A. Words.
B. Gesture and posture.
C. Facial expressions.
D. Special signals.

[单项选择]Practically all animals communicate either through sounds or through soundless codes.
A. Certainly
B. Probably
C. Almost
D. Absolutely