Question

Many poems by Longfellow (has, have) effective descriptive passages.
which one makes sense

Answer 1

Answer: has

Step-by-step explanation:

Has more or less is used when talking about someone or thing else like "Larry has many books" have more or less is used when talking about your self like "I have 4 dollars"

Answer 2

Have makes more sense

Step-by-step explanation:

try the different words and see which sounds right

Many poems by Longfellow has effective descriptive passages

or

Many poems by Longfellow have effective descriptive passages

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