It means that they are so familiar with the song that they could revise it identically - in simpler words, they can sing it without any mistake.
Answer:
A
Explanation:
it says "The story of the telephone’s invention in 1876 is one of hard work, determination, and triumph."
<span>There is a weak smell that is soft, but can't be determined by words, the communicator said these final words from their freezing voice, "Good-bye, little sister"
hope that helps :)</span>
Increasing demand for flat-screen TVs, according to estimates, could have a greater impact on global warming than the world's largest coal-fired power plants. Flat screen manufacturers use a greenhouse gas known as nitrogen trifluroide, and as these displays are becoming more and more popular, annual gas production has grown to about four thousand tons. Nitrogen trifluroid is the most dangerous global warming engine, for comparison, this gas is 17,000 times stronger than carbon dioxide.