VI. Read the following passage. Then read sentences A-F, and choose the one that best fits each gap. There is ONE extra sentence.
In recent years, environmentalists have become more and more concerned about the number of animals facing extinction. __(21)___ Unless we do something to save them now, we may soon lose many species forever. __(22)___ Habitat loss is the main reason for animal extinction and it occurs for a number of reasons, including massive building development, intensive agriculture and the destruction of rainforests. Recently, governments have made international agreements between countries to protect the rainforests and prevent deforestation through financial support. __(23)___ It should be considered as crime when people poach endangered animals or buy and sell products made from endangered species. By doing so, many animals, such as tigers and alligators, would have a better chance of survival.__ (24) ___ In this way, rare species will be able to live safely without losing their homes to human beings, or their lives to illegal hunters. Therefore, animals can successfully reproduce and multiply. __(25)___ Without care and consideration, they will certainly disappear.
__(21)___
