Question

select the three adjectives. dont select any articles (a, an, or the).

the chemist opened the heavy door and quietly entered the bright, clean laboratory.

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not feeling ready yet? these can help:
identify adjectives
identify the adjective that describes the noun

Explanation:

To solve this, we identify words that describe nouns. "Heavy" describes "door", "bright" describes "laboratory", and "clean" describes "laboratory". Articles like "the" are excluded.

Answer:

heavy, bright, clean