What does single line through the center mean in English?

It means to draw a horizontal line on the answer sheet where the card is drawn.

The translation of the full sentence is: On the answer sheet, draw a horizontal line through the center of the corresponding letter.

English (English: English) is a West Germanic language that was first spoken in Britain in the Middle Ages and has become the most widely spoken language in the world due to its vast colonies. The Anglian tribe, the ancestors of the British, was one of the Germanic tribes that later migrated to the area of ??the island of Great Britain, known as England. Both names come from the Baltic Peninsula.

The language is closely related to Frisian and Lower Saxon, and its vocabulary has been influenced by other Germanic languages, especially Norse (North Germanic), and to a large extent by Written in Latin and French. English has developed over 1,400 years. The earliest form of English is a group of West Germanic (Ingvaeonic) dialects brought to Britain by Anglo-Saxon immigrants in the 5th century, collectively known as Old English.

Middle English began at the end of the 11th century. When the Normans conquered England in 1476, William Caxton introduced the printing press to Britain and began publishing the first printed books in London, expanding the influence of English. force. Since the 17th century, modern English has spread around the world under the widespread influence of Britain and the United States.

Through a variety of print and electronic media in these countries, English has become one of the dominant international languages ??and is dominant in many regional and professional contexts, such as science, navigation and law.