Use the sentences on the left to complete the paragraphs on the right. These sentences are in the order in which they happened - so (1) happened before (2), (2) before (3) etc. But your paragraph begins with the underlined sentence, so sometimes you need the past perfect.

Sure, I would be happy to act as a school teacher and provide a detailed and comprehensive answer to your question. Here is the step-by-step solution, along with explanations and justifications, to make it understandable for a student.

To complete the paragraphs on the right, we need to use the sentences on the left in the correct sequence. Remember, the underlined sentence will be the first sentence in each paragraph, so we might need to use the past perfect tense in some cases.

Here are the sentences on the left:

1. They had already finished their homework when their friends arrived.
2. He had gone to the store before the movie started.
3. The students had studied for the test, so they were well-prepared.
4. She had already passed her driving test when she bought her first car.
5. I had already made plans for the weekend before I received the party invitation.

Now, let's complete the paragraphs:

Paragraph 1:
- Underlined Sentence: They had already finished their homework when their friends arrived.

Explanation: This sentence indicates that the completion of homework happened before the arrival of their friends. Therefore, we need to use the past perfect tense to show the earlier action.

Completed Paragraph: They had already finished their homework when their friends arrived. They were excited to spend the evening together and have fun.

Paragraph 2:
- Underlined Sentence: He had gone to the store before the movie started.

Explanation: This sentence tells us that going to the store happened before the start of the movie. Since the underlined sentence comes first, we need to use the past perfect tense.

Completed Paragraph: He had gone to the store before the movie started. He bought some snacks and drinks to enjoy during the film.

Paragraph 3:
- Underlined Sentence: The students had studied for the test, so they were well-prepared.

Explanation: This sentence suggests that the students studying for the test occurred before being well-prepared. We need to use the past perfect tense to indicate the earlier action.

Completed Paragraph: The students had studied for the test, so they were well-prepared. They felt confident and ready to showcase their knowledge.

Paragraph 4:
- Underlined Sentence: She had already passed her driving test when she bought her first car.

Explanation: This sentence indicates that passing the driving test occurred before buying the first car. We use the past perfect tense because the underlined sentence comes first.

Completed Paragraph: She had already passed her driving test when she bought her first car. Now, she could enjoy the freedom of driving.

Paragraph 5:
- Underlined Sentence: I had already made plans for the weekend before I received the party invitation.

Explanation: This sentence shows that making plans for the weekend happened before receiving the party invitation. We need to use the past perfect tense as the underlined sentence is the first in the paragraph.

Completed Paragraph: I had already made plans for the weekend before I received the party invitation. Unfortunately, I had to decline the invitation this time.

By following this structure and using the past perfect tense in the appropriate places, we can create coherent and logical paragraphs that reflect the chronological order of events.