Question

which sentence is punctuated correctly?
when i arrived at school all of my desks were gone.
when i arrived at school, all of my desks were gone.
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Explanation:

To determine correct punctuation, we analyze the sentence structure. The phrase "When I arrived at school" is a dependent clause (adverbial clause of time), and it should be followed by a comma when introducing the independent clause "all of my desks were gone." The first option lacks the comma after the dependent clause, making it incorrect. The second option uses the comma correctly to separate the dependent and independent clauses.

Answer:

B. When I arrived at school, all of my desks were gone. (assuming the second option is labeled B; if the first was A and second B, the correct one is the second option with the comma)