16.
Your Answer is
Correct Answer is F
Explanation
According to the meaning of the sentence, the expression "except for some years" here is correct for item F except prep. Except....
G item: exception does not have this word.
Item H: excepting prep Except..., prepositions are not nouns, so you cannot use with the excepting of.
Item J: The semantics do not match the meaning of the text.