单项选择题

A．English.
B．Biology.
C．Introduction to English Literature.
D．A required course.
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单项选择题
A．He was the first person to appear on television.B．It was he who discovered the wonder o~ television.C．He made the very first step towards the invention of television.D．He developed the television and was the first person to demonstrate it.
A．He was the first person to appear on television.
B．It was he who discovered the wonder o~ television.
C．He made the very first step towards the invention of television.
D．He developed the television and was the first person to demonstrate it.
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