Hi, is this a Declarative sentence?

I am furious because that man hit my new car.

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Are the following sentences correct?
Simple-Compound-Complex-Compound-complex

1.It seemed to the students that the school year would never end, but they continued to study in order to pass with honors. ( A compound sentence)

2. It seemed to the students that all they did was study and prepare for their examination. ( Simple sentence)

3. All the students and their teachers worked hard, looking forward to the completion of the school year. ( Complex sentence)

4. The teachers joked and laughed at the end of school, and the students shouted and clapped their hands. ( (Compound sentence)

5. Did you think that the students did as well this year as they did last year? (Simple sentence)