The last time we had great fun was _____ we were visiting the Water Park.
---Are you going to attend the meeting _____ next Saturday?---I won’t unless invited.
________ excited Geoff Marcy most was ________ there were planets in other solar system where life might exist.
I am sorry, but I didn’t mean to keep you waiting here for so long. Can you ___________me?
This is the very spot ___________gold was discovered long ago
The teacher doesn’t permit ___________in class.