Which sentences contain prepositions? Check all that apply.
1. Lena bought a new table to put the sculpture on.
2. At what time is the performance scheduled to begin?
3. The committee includes three students and two teachers.
4. That is the house in which I grew up.
5. Jonathan looked under his desk for the lost keys.
I'm not 100% sure, but it seems right to me. In number one, the word "to" is the preposition. In number 4, the word "in" is the preposition, and "under" is the preposition in 5.