HEL ASAPP PLEASEE!! (The capital words in the sentence are supposed to be underlined)

1.) Identify the part of the speech underlined in the sentence.
Put the book INSIDE your desk.
A- Preposition
B- Conjunction
C- Interjection

2.) Identify the part of the speech underlined in the sentence.
WOW! i cant believe that I won the contest.
A- Preposition
B- Conjunction
C- Interjection

3.) Identify the part of the speech underlined in the sentence.
I went to the store AND bought a new notebook.
A- Preposition
B- Conjunction
C- Interjection