Thomas Edison spent years on his monumental inventions which brought light to human being.

（So great) （was) the influence of Thomas Paine （on) his own time that John Adams suggested

The country has ______people and ______money ______spent on tobacco every year.A．a large q

______ the financial means to remain independent, Thomas Edison was compelled to seek empl

It was well known that Thomas Edison（)the electric lamp.A inventedB discoveredC foundD

Scientists have spent years researching into the _____ of sleeping pills on the hum

It is said in the book that Thomas Edison （1847～1