Question

sleep, (he or she/they) can become cranky.
highlight the vague pronoun.
although the glass fell on my foot, it was not broken.
add commas where needed.

Explanation:

1. For the pronoun task: The word "it" has two possible antecedents (the glass or the foot), making it vague.
2. For the comma task: The given sentence already has the correct comma after the introductory dependent clause, so no additional commas are needed.

Answer:

1. Vague pronoun: it
2. No additional commas needed; the sentence is already correct: Although the glass fell on my foot, it was not broken.