This depends on the sentence given. Prepositions are words that associate an object to a certain location or position. Examples of prepositions are: on, after, below, by, during, and many more. If you want to use the word 'opportunities' as the object of your preposition, an example would be as follows:
Mary is hopefully praying for good luck as she takes on opportunities. The preposition is 'on' and the object of preposition is 'opportunities'.
Answer:
Irregular
Explanation:
You can think of "regular" as several neat rows or many similar things. They are all "regular" with each other and you can sort of predict what will come next.
There does not seem to be a specific pattern here, so we can conclude the answer most likely is irregular.
The answer is the second one from the top (she sighs softly).
Another PROTEIN, across a cell membrane
The answer is complete thought.