Immigration should be regulated because only legal immigrants contribute to the economy, skilled immigrants fill in-demand job vacancies and legal migration provides a safe option for at-risk groups of people to immigrate to the United States.
"Of" is a preposition in the phrase "Of studying" and "until" is another, as well as "to" in the phrase "to college" so there are 3 in that sentence.
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Answer: what
Explanation: i only clicked on this because i thought we were talking about jessie.
