C．The supermassive black hole had existed before the Milky Way was formed.

　　D．There is a reason why the large black holes are called “supermassive”．

　　答案　D　[推理判断题。根据文章倒数第二段和第三段推断。故选D。]

　　5．The last two paragraphs mainly focus on the question of________．

　　A．what a black hole is

　　B．how black holes form

　　C．how big black holes are

　　D．how scientists know about black holes

　　答案　D　[主旨大意题。文章的最后两段都在说明科学家们是怎么样了解黑洞现象的，故选D。]

　　【2017高考英语马鞍山市质量检测】

　　阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

　　My wife Julie and I were out on the road that runs around where we live, when we saw an old worn-out dog stumbling (蹒跚) painfully up the road. We stopped, bent down, talked gently to the dog and patted it. I checked and there was a collar with a phone number. I called but no one answered.

　　The dog was painfully thin. So Julie ran home to get some of our dog’s food while I tried to encourage the dog. After Julie came back, we sat down on the sidewalk while our new friend made short work of the food. Eventually we got her home.

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