[单项选择]Maybe the word "hello" is used mere often than any other one in the English language. Everyone in the U. S. A. and other countries uses the word, again and again, every day of the week.
The American inventor Thomas Edison is believed to be the first person to use "hello" on the telephone soon after the invention of it.
At first, people began their words on the telephone with "Are you there " They were not sure the small machine could really carry voices.
Edison was a man of few words. He wasted no time. The first time he picked up the telephone, he didn’t ask if anyone was there. He was sure someone was there and only said, "Hello!"
From then on, "hello" is often heard when you picked up the telephone.

The word "hello" was used by Edison every day.
A. Right
B. Wrong
C. Doesn’t say

[单项选择]Maybe the word "hello" is used mere often than any other one in the English language. Everyone in the U. S. A. and other countries uses the word, again and again, every day of the week.
The American inventor Thomas Edison is believed to be the first person to use "hello" on the telephone soon after the invention of it.
At first, people began their words on the telephone with "Are you there " They were not sure the small machine could really carry voices.
Edison was a man of few words. He wasted no time. The first time he picked up the telephone, he didn’t ask if anyone was there. He was sure someone was there and only said, "Hello!"
From then on, "hello" is often heard when you picked up the telephone.

The word "hello" was used by Edison every day.
A. Right
B. Wrong
C. Doesn’t say

[单项选择]

Concrete is probably used more widely than any other substance except water, yet it remains largely unappreciated. “Some people view the 20th century as the atomic age, the space age, the computer age — but an argument can be made that it was the concrete age,” says cement specialist Hendrik Van Oss. “It’s a miracle material.” Indeed, more than a ton of concrete is produced each year for every man, woman and child on Earth. Yet concrete is generally ignored outside the engineering world, a victim of its own ubiquity and the industry’s conservative pace of development. Now, thanks to environmental pressures and entrepreneurial innovation, a new generation of concretes is emerging. This high-tech assortment of concrete confections promises to be stronger, lighter, and more environmentally friendly than ever before.
Concrete is also a climate-change villain. It is made by mixing water with an aggregate, such as sand or gravel, and ce
A. the traditional building material concrete is the only man-made miracle
B. concrete is indispensable in the development of modern construction industry
C. compared with other inventions, concrete is more practical and useful
D. concrete, as a building material, can be mixed with any other materials