Where did the ussr have their war equivalent of the united states' war in vietnam?

The Hong Kong flu becomes a major flu

Explanation:

This is the sentence that best indicates what structure the paragraph will follow. In this passage, we learn that the author will talk about the Hong Kong flu. However, we might not know exactly how he will address the subject. Nevertheless, by looking at the words that the author uses, we can see that the structure will be a descriptive one. This is because the sentence talks about the Hong Kong flu, and describes how this flu is a type of major flu.