18.

Answer and Explanation

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".