Nominative case pronouns:
I
you
he, she, it
we
you
they
Objective case pronouns:
me
you
him, her
us
you
them
Look at:
<span>Paul and *** I *** decided to go to the library to find a magazine.
"I" is a pronoun in the nominative case.
All pronouns in the other sentences, "him", "us", and "me" are objective case.
</span>
If you're overusing exclamation points in your writing, you're making it seem a bit to exciting, and will have to much of an enthusiastic tone. Thus the readers will be confused.
Answer: A. We are going to the McDonald Observatory where we will try to see Mars and other planets.
Explanation: The name of the observatory is "Mcdonald Observatory" so you would capitalize both, along with Mars. Please mark barinliest <3
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