There are about 5,000 different languages. Nearly 900 languages are spoken in India. 小题1: .
Chinese is the language spoken by the most number of people in the world. But the most widely spoken language in the world is English. 330，000，000 people speak English as the first language.
小题2: as a foreign language. Travelers and business people all over the world use English. And two thirds of the world’s scientists read in English. About 200 million users of the Internet communicate in English, too. It is one of the most important language in the world. 小题3: .
How many words are there in the English language? There are about 490,000. Also, there are about 300,000 words used in science. There are more words in English than in any other language. But most people use no more than 60,000 words.
It’s true that English is changing with the development of the world. Since the 1990s, English learning has been very popular with Chinese people. Many of them have done well in English and have made great progress.
Now, 小题4: and the study of English is regarded as a very important industry in China as well as in the rest of the world. Children leaving school at the age of 16 know about 15,000 words.
小题1:D
小题2:B
小题3:A
小题4:C
题目分析：这篇短文给我们讲述的是世界上使用最广泛的语言—英语。世界上有3亿3千万人把英语当做第一语言，还有6亿5千万人把英语当做第二语言。旅行者、商人、因特网上都主要使用英语。从上世纪90年代开始，中国人也开始流行学习英语。
小题1:句意：世界上大约有5,000种不同的语言，印度就要将近900种。在所有的这些语言中，英语是使用最广泛的。根据句意可知，这里应该是承接上文，在这很多种语言中，使用最广泛的是英语。故选D。
小题2:句意：有330,000,000人把英语当做第一语言，还有将近两倍，大约6亿5千万人把英语当做外语在使用。这两句话告诉我们，世界上有很多人说英语，不管是当做第一语言还是第二语言。故选B。
小题3:句意：英语是世界上最重要的语言之一，它也变得越来越受欢迎。根据这里的句意可知，世界上有很多国家的人都在说英语，它变得越来越受欢迎。故选A。
小题4:句意：现在，学生们都需要学习英语，除了世界上的其他一些国家，在中国英语的学习也被认为是很重要的一个产业。根据句意可知，这里说的是世界上的一些国家里，学生们都在学习英语。故选C。