公共英语考试

【单选题】 Which statement can be the main idea of the passage
A．Glass is very useful because it has unusual qualities.
B．Light signals have changed the use of glass in industry.
C．Glass fibres have reduced the cost of telephone communication.
D．The use of glass fibres to carry telephone messages is an interesting new development.

网考网参考答案：D
网考网解析：
[解析] 整篇文章都在讲玻璃的一种新兴技术——通信。 查看试题解析出处>>