I (WRITE)... TO MY PEN PAL TWO MONTHS AGO, BUT I (NOT RECEIVE) ......

5. I (write)... to my pen pal two months ago, but I (not receive) ... his replysince then.C. READING (2,5pt)I. Fill each of the numbered blanks in the following passage. Use only one word ineach space. (1pt)was problem children example ItPopulation growth is a serious (1)... around the world. At the beginning of the 20thcentury, there were about 1. 5 billion people in the world. In 1984 the world population(2)... 4. 8 billion people. By the year 2000,. (3)... will be about 6. 1 billion. Thisgrowth in population is not happening everywhere For (4)... in Europe the populationis not growing at all families in these countries are smaller now. Only about 2. 1(5)... are born for every woman.II. Read the following passage and answer the following questions. (1,5pt)Solar energy is a long lasting source of energy which can be used almost anywhere. Togenerate solar energy, we only need solar cells and the sun! Solar cells can easily beinstalled on house roofs, so no new space is needed and each user can quietly generatetheir own energy. Compared to other renewable sources, they also possess manyadvantages. Wind and water power rely on turbines which are noisy, expensive and easyto break down. Solar cells are totally silent and non-polluting. As they have no movingparts, they require little maintenance and have a long lifetime.However, solar energy also has some disadvantages. We can only generate solar energyduring daytime because the system depends on sunlight. Besides, solar cells require largearea to work effectively. The main disadvantage of solar energy is that it costs abouttwice as much as traditional sources such as coal, oil, and gas. This is because solar cellsare expensive. Scientists are hoping that the costs of solar cells will reduce as more andmore people see the advantages of this environmentally friendly source of energy.