The correct word is 'sneeze'; vowels in words have either short or long 'e' sounds; allergic reactions to pollen often lead to sneezing.
The correct word to fill in the blank is 'sneeze.' In the sentence provided, the pollen caused the action of sneezing, which is the correct verb form to use.
When we analyze the vowels in the given words, 'green', 'me', and 'beam' have long sounds, while 'slept', 'dense', and 'fell' have short sounds.
Allergic reactions are common to pollen, causing symptoms like sneezing. In the provided text, the individual's reaction to the pollen was highlighted through symptoms like sneezing.
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