Read the text and choose the correct word.

Thomas Edison was born in 1847 in Milan, Ohio, but grew up in Port Huron, Michigan after the family moved there in 1854. He was the seventh and ... child of Samuel Ogden Edison Jr. and Nancy Matthews Elliott. His family line was Dutch, the surname had ... been "Edeson".
Edison was taught reading, writing, and arithmetic by his mother who used to be a school ... . He attended school for only a ... months. However, one biographer described him as a very curious child who learned most things by reading on his ... . As a child, he became fascinated with technology and spent hours working on experiments at home.
Edison ... hearing problems at the age of 12. The cause of his deafness was scarlet fever* during childhood and untreated middle-ear infections. As he got ... , Edison believed his hearing loss allowed him to avoid distraction and concentrate more easily on his work. Modern-day historians and medical professionals have suggested he may have had ADHD*.
It is known that early in his career he ... in a chemistry course at The Cooper Union for the Advancement of Science and Art, to support his work on a new telegraphy system with Charles Batchelor. This appears to have been his only enrollment in courses at an institution of higher learning.

*scarlet fever - скарлатина
*ADHD - СДВГ \(Синдром дефицита внимания и/или гиперактивности\)