Question

Which word best completes the sentence? Ten million dollars is definitely __________ of money for most of us. A. alot B. a lot

Answer 1

B. a lot ......Ten million dollars is definitely a lot of money for most of us. 
(There is no such word as 'alot'.)

Answer 2

B. a lot"Alot" is a common error in English but there is no such word.