Choose the best words or expressions and complete the passage (选择最恰当的单词或词语完成短文)
______________years ago, people in London got water from a river. But later the river became very
____________because many factories were built near the river. People threw many things
____________the river. By the year 1830, the city was polluted. No fish could live in the water. And nobody could
__________the water. People tried their best
____________it. In 1960 the river became clean
____________, and in 1990, 78 different kinds of fishes were found in it.
| 1． | | A．Hundred | B．Hundreds of | C．Hundred of | D．Two hundreds of |
|
| 2． | | A．clean | B．dirty | C．beautiful | D．wide |
|
| 4． | | A．drink | B．eat | C．pollute | D．make |
|
| 5． | | A．change | B．changed | C．to change | D．changing |
|
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