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There is now increasing concern about the world's energy, particularly about those involving fossil (1)________. In less than a hundred years we shall probably exhaust all the present sources of oil and gas. The world’s coal reserves should last longer but, once used up, these cannot be (2)_______. It is important, therefore, that we should develop such (3)_______sources of energy as solar energy and nuclear energy as well  as water and wind (4)_______ . Until these energy (5)_______are widely used, it is important for the developed countries to reduce energy consumption as much as possible.

• 1. A. fuels​​

• B. powers​​

• C. forms​​​

• D. energies

There is now increasing concern about the world's energy, particularly about those involving fossil (1)________. In less than a hundred years we shall probably exhaust all the present sources of oil and gas. The world’s coal reserves should last longer but, once used up, these cannot be (2)_______. It is important, therefore, that we should develop such (3)_______sources of energy as solar energy and nuclear energy as well  as water and wind (4)_______ . Until these energy (5)_______are widely used, it is important for the developed countries to reduce energy consumption as much as possible.

• 2. A. updated​​

• B. repeated​​

• C. renewed​​​

• D. produced​

There is now increasing concern about the world's energy, particularly about those involving fossil (1)________. In less than a hundred years we shall probably exhaust all the present sources of oil and gas. The world’s coal reserves should last longer but, once used up, these cannot be (2)_______. It is important, therefore, that we should develop such (3)_______sources of energy as solar energy and nuclear energy as well  as water and wind (4)_______ . Until these energy (5)_______are widely used, it is important for the developed countries to reduce energy consumption as much as possible.

• 3. A. traditional​

• B. alternative​​

• C. revolutionary​​

• D. surprising​

There is now increasing concern about the world's energy, particularly about those involving fossil (1)________. In less than a hundred years we shall probably exhaust all the present sources of oil and gas. The world’s coal reserves should last longer but, once used up, these cannot be (2)_______. It is important, therefore, that we should develop such (3)_______sources of energy as solar energy and nuclear energy as well  as water and wind (4)_______ . Until these energy (5)_______are widely used, it is important for the developed countries to reduce energy consumption as much as possible.

• 4. A. force​​

• B. strength​​

• C. power​​​

• D. motion​

There is now increasing concern about the world's energy, particularly about those involving fossil (1)________. In less than a hundred years we shall probably exhaust all the present sources of oil and gas. The world’s coal reserves should last longer but, once used up, these cannot be (2)_______. It is important, therefore, that we should develop such (3)_______sources of energy as solar energy and nuclear energy as well  as water and wind (4)_______ . Until these energy (5)_______are widely used, it is important for the developed countries to reduce energy consumption as much as possible.

• 5. A. goods​​

• B. supplies​​

• C. provisions​​​

• D. materials

(1)_______more and more countries become industrialized, there will be more and more competition for petroleum for cars, home heating, and industry. While burning petroleum contributes greatly (2)_______acid rain, it is less (3)_______than coal. Unfortunately, petroleum is more expensive than coal and the supply of petroleum will eventually run out. (4)_______, there will be more and more pressure to burn coal for energy. Coal is a (5)_______dirtier energy source than petroleum. Since we already know how destructive acid rain is, it is very important that we increase our efforts to find a non – polluting source of energy as quickly as possible so that we can avoid further environmental damage.

• 1. A. Although​​

• B. Even​​

• C. As ​​​

• D. Also

(1)_______more and more countries become industrialized, there will be more and more competition for petroleum for cars, home heating, and industry. While burning petroleum contributes greatly (2)_______acid rain, it is less (3)_______than coal. Unfortunately, petroleum is more expensive than coal and the supply of petroleum will eventually run out. (4)_______, there will be more and more pressure to burn coal for energy. Coal is a (5)_______dirtier energy source than petroleum. Since we already know how destructive acid rain is, it is very important that we increase our efforts to find a non – polluting source of energy as quickly as possible so that we can avoid further environmental damage.

• 2.   A. to​​​

• B. on​​​

• C. for​​​

• D. with

1)_______more and more countries become industrialized, there will be more and more competition for petroleum for cars, home heating, and industry. While burning petroleum contributes greatly (2)_______acid rain, it is less (3)_______than coal. Unfortunately, petroleum is more expensive than coal and the supply of petroleum will eventually run out. (4)_______, there will be more and more pressure to burn coal for energy. Coal is a (5)_______dirtier energy source than petroleum. Since we already know how destructive acid rain is, it is very important that we increase our efforts to find a non – polluting source of energy as quickly as possible so that we can avoid further environmental damage.

• 3.   A. pollute​​​

• B. polluting​​

• C. pollution​​

• D. polluted

(1)_______more and more countries become industrialized, there will be more and more competition for petroleum for cars, home heating, and industry. While burning petroleum contributes greatly (2)_______acid rain, it is less (3)_______than coal. Unfortunately, petroleum is more expensive than coal and the supply of petroleum will eventually run out. (4)_______, there will be more and more pressure to burn coal for energy. Coal is a (5)_______dirtier energy source than petroleum. Since we already know how destructive acid rain is, it is very important that we increase our efforts to find a non – polluting source of energy as quickly as possible so that we can avoid further environmental damage.

• 4.   A. Therefore​​

• B. However​​

• C. For example​

• D. Consequently

(1)_______more and more countries become industrialized, there will be more and more competition for petroleum for cars, home heating, and industry. While burning petroleum contributes greatly (2)_______acid rain, it is less (3)_______than coal. Unfortunately, petroleum is more expensive than coal and the supply of petroleum will eventually run out. (4)_______, there will be more and more pressure to burn coal for energy. Coal is a (5)_______dirtier energy source than petroleum. Since we already know how destructive acid rain is, it is very important that we increase our efforts to find a non – polluting source of energy as quickly as possible so that we can avoid further environmental damage.

• 5.   A. more​​​

• B. much​​

• C. many​​

• D. most