Answer:
The poem dust of snow tells us about the curative power of nature. Nature has the cure for everything whether it is a bad mood or illness. The poet is going through one such bad day when a crow suddenly shook down on him dust of snow from a hemlock tree. The snow instantly makes him happier.
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Answer:
B: the students are the subject of the sentence and the doers of the verb.
Explanation:
A, C, and D are still passive because the subject is being acted upon.