Fill in the blank with the appropriate subject pronoun.
The dog is barking loudly. (He/She/It/I/We/You/They) _________ is barking loudly.
My sister and I are going to the park. (He/She/It/I/We/You/They) _________ are going to the park.
The sun is setting in the west. (He/She/It/I/We/You/They) _________ is setting in the west.
Maria and John won the prize. (He/She/It/I/We/You/They) _________ won the prize.
The books are on the shelf. (He/She/It/I/We/You/They) _________ are on the shelf.
I finished my homework early. (He/She/It/I/We/You/They) _________ finished my homework early.
The birds are singing in the trees. (He/She/It/I/We/You/They) _________ are singing in the trees.
You and your friends are invited to the event. (He/She/It/I/We/You/They) _________ are invited to the event.
The flowers in the garden look beautiful. (He/She/It/I/We/You/They) _________ look beautiful.
The students completed their assignment. (He/She/It/I/We/You/They) _________ completed their assignment.