18.
Your Answer is
Correct Answer is J
Explanation
Item J: including is the preposition "contains, includes".
F item: include does not have tense.
Item G: According to the sentence meaning, the tense of the attributive clause should be consistent with the tense of the main clause (requires).
Item H: since including is wrong, add the expression of time after since when doing "since", and add a sentence when doing "because".