The cost of buying a house in Beijing is higher than ______in Luoyang。
A．it
B．one
C．that
D．this
答案：C
题目分析:考查不定代词。It特指上文出现的名词；one泛指上文出现的单数名词；that可以代替不可数名词，；this用于指下文要提到的事物。从句意可知此处是北京房子的费用和洛阳房子的费用相比，所以应该用that代替不可数名词cost。句意：在北京买一所房子的费用要比在洛阳高。
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| How to get rid of waste is a great problem for the world today. Waste must be treated 1 it does not become a danger to life. 2 , in some countries, waste from factories is still poured straight into rivers. People who use the water from one of these rivers often get 3 . The water may become so polluted that it 4 all the fish in the river. When these rivers finally reaches the 5 , it pollutes the ocean. In many countries with 6 , human waste is piped directly into the sea without being dealt with. This is not 7 . Although the sea itself can break up the waste, beaches 8 become polluted. 9 scientists suggest people take the waste far out to sea in ships where the wind and waves break it down. In 1989 an international law was passed to 10 people putting waste into the sea. It is now against the 11 to put anything into the sea nearby. Such rubbish as plastics may not be thrown 12 the sea anywhere. Other waste may be put into the sea, either 19 or more than 40 kilometers from land, 13 the nature of the materials. The 14 of dealing with waste has become so great that several international organizations have been 15 to protect the world and control pollution. | ||||
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