Part : A
Read the passage below and answer the questions 1-4
The environment refers to the air, water and land in which people, animals, and plants live. So, human beings, animals, plants, air, water and soil are the main elements of the environment. The natural forces such as storms, cyclones and earthquakes are also a part of this environment. Climate is thus a condition of the environment.
All things that make up the environment are interrelated. The way in which people, animals and plants are related to each other and to their surroundings is known as ecology. The ecosystem is a complex web that links animals, plants and every other life form in the biosphere. All these things hang together. The system is in a steady state of dynamic balance which means that by altering any one part of the web you can affect all the other parts. For example, the destruction of forests may have serious ecological consequences on humans and animals.
It is the responsibility of human beings to prevent the environment from being spoilt. To make life healthy and comfortable we should keep environment clean and danger free. But often people spoil the environment by doing unwise things and, as a result, endanger their own lives. It is the ecological imbalance that causes changes in the world’s climate and brings about different kinds of natural disasters.
1.    Choose the right word to complete each sentence :         5
    a. The environment comprises/include/ interferes air, water and land.
    b. The natural forces meaning/ mean/ notify storms, cyclones and earthquakes.
    c. The ecosystem is a complex structure / harmony/ network that links animals, planets and human beings in the biosphere.
    d. It is human responsibility to prevent the environment from be /doing /being spoilt.
    e. Only ecological imbalance make /cause /threatens the existence of the earth.
2.    True/false? If false, give the correct information.     5
    a. Human beings and animals mainly depend on plants.
    b. Living things, including animals alone, do not form the ecosystem in the biosphere.
    c. If one part in the biosphere is changed, all the other parts are affected.
    d. Destruction of forests is the only cause of ecological imbalance.
    e. Climate is also condition of environment.
3.    Fill in the gaps with the correct form of the words. Add any preposition if necessary.     5
    a. All things are interrelated and (alter) ____any apparently insignificant element causes  imbalance
    b. We should keep our environment (save) ______ pollution.    
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