Question

which of the following is a compound - complex sentence? the school days was long but rewarding. while at school, we learned about atoms and molecules.

Explanation:

A compound - complex sentence has at least two independent clauses and at least one dependent clause. "The school days was long but rewarding" is a simple sentence with a compound predicate. "While at school, we learned about atoms and molecules" has one dependent clause "While at school" and one independent clause "we learned about atoms and molecules", so it is a complex sentence, not compound - complex. Since no valid compound - complex sentence is shown among the options, this question seems to be incomplete in terms of answer choices. However, based on the knowledge of sentence types, a compound - complex sentence example would be like "Although it was raining, we went to the park, and we had a great time" where "Although it was raining" is a dependent clause and "we went to the park" and "we had a great time" are independent clauses.

Answer:

No correct option provided among the given ones.