Courage is a virtue seems like the answer, but I haven’t read the book. Though, I’m making an education guess because it takes courage to go to the moon.
Personal pronouns is the same as asking for singular nouns or pronouns because they both express words that deal with just one person. Personal Pronouns has the job to replace a characters name with terms such as “he” or “she” so the name won’t be repetitive throughout the whole story or so the story may have a shorter format.
Personal Pronouns use words:
I, you, he, she, it, we, they, me, him, her, us, and them
However, there’s also 1st point of view, 2nd point of view and 3rd point of view pronouns that would be worthy of looking searching :)
Answer:
What you should put is The moter oil was used often and the syntheic oil has many advantages and the envirorment and society.
Explanation: