The rivers will become dirtier and dirtier________ we take action to protect them.

A. since B. if C. until D. unless

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通讀下面短文，掌握其大意，然后在1—10各題所給的A、B、C、D三個選項中，選出一個最佳選項。

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Do you know Ma Yun? He is Founder(創(chuàng)始人) and Chairman(董事長) of Alibaba (阿里巴巴) Group. Ma was born in Hangzhou. At an early age, ma wanted to learn English so he rode his bike each morning in order to go to a nearby hotel and talked with foreigners. He would guide them around the city for free(免費的) in order to practice and improve English.

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In the early of 1995, he went to the United States, and with the help of his friend he got introduced to the Internet. In April 1995, Ma, his wife and a friend collected twenty thousand dollars and started an Internet company. He named their first company “ China Yellow pages”. Within three years(在3年內(nèi)) his company had made 5 0000000 Chinese yuan. In 1999, he decided to give up his job in the US, and went back to Hangzhou with his team in order to found(成立) Alibaba. Alibaba is a China - based business - to- business marketplace site on the internet. It serves(為...服務) more than 79 million members from more than 24o countries and areas. In September 2014Alibaba became one of the most valuable companies in the world. Ma Yun becomes one of the most successful businessman in China.

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C. Alibaba had made 5000, 000 dollars in three years

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B. The Story of China yellow Pages

C. The Story of Alibaba

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