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Aspirin was invented in 1897. However, the _____ chemical used to make aspirin can be found in nature. Nearly 3,500 years ago, people ____ on leaves or drank a kind of tea made from leaves _____ a special chemical to reduce body pains and _____.
It was in 1897 that a _____ chemist called Dr Felix Hoffmann produced aspirin from this chemical. The first _____ of this medicine took place in 1899, when the company Hoffmann worked for began _____ the medicine in powder form to physicians to use with _____. A year later, in 1900, aspirin was sold in shops in the form of _____.
However, a recent survey _____ in the USA shows that 80 per cent of Internet users _____ it mostly to search for answers to questions. The second most common use of the Internet, for 79 per cent of Internet users, is to find out information about _____. These statistics _____ that gathering information is the _____ use for the Internet.
Another truly wonderful _____ of the Internet is the way people use it to build social _____. One of the greatest benefits of Internet friendships is that they are _____ on common interests, rather than _____ or age. Young people from _____ backgrounds and different countries can form friendships that will last their _____ lives.

科目 英语   题型 单词拼写   难度 中等