You could define what a drug test is
I think your question is incomplete...
The underlined subject of the sentence the skyscraper that was built last year is a noun phrase.When determining the type of phrase, you first need to find its center, of the most prominent word. Here, the center is skyscraper, which is a noun, which means that the whole phrase is a noun phrase.
Answer:
Explanation:
Era relates to science because era means "a major division of time that is a subdivision of an eon and is itself subdivided into periods."
