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　　1.單選題

　　[填句補(bǔ)文]The black robin(旅鶇)is one of the world‘s rarest birds. It is a small， wild bird， and it lives only on the island of Little Mangere， off the coast of New Zealand. In 1967 there were about fifty black robins there; in 1977 there were fewer than ten. ________.

　　A、These are the only black robins left in the world.

　　B、Those that fail to meet the challenges will disappear early.

　　C、Both represent orders in the classification of life.

　　D、Detailed studies are going on， and a public appeal for money has been made.

　　正確答案：A

　　答案解析：前文說(shuō)的是The black robin(旅鶇)的現(xiàn)存數(shù)量和活動(dòng)地點(diǎn)。選項(xiàng)A說(shuō)的是這里成為有The black robin的唯一的地方。所以，選項(xiàng)A是合適的選項(xiàng)。

　　2.單選題

　　[填句補(bǔ)文]Some 20，000 tons of antibiotics are used in the European Union and the US each year. More than half are give to farm-animals to prevent disease and promote growth. ________.

　　A、The warning comes from a researcher in Switzerland who looked at levels of the drugs in farm slurry.

　　B、The drugs could be getting into our food and water.

　　C、Many drugs given to humans are also excreted unchanged.

　　D、But recent research has found a direct link between the increased use of these farmyard drugs and the appearance of antibiotic-resistant bugs that infect people.

　　正確答案：D

　　答案解析：前兩句講的是抗生素在歐洲和美國(guó)的大量使用，這句講的是由此導(dǎo)致的不良后果，接上去是最合理不過(guò)的。But明確地表明了這一轉(zhuǎn)折。

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