What will happen _______ people if they don’t protect the environment?[ ]

All the oil in the world will have __________ some day. —Yeah. What shall we use for power at that time?

Where is my pen? —Oh, sorry, I have taken________ by mistake.

Mike went to the library ________ some books yesterday.

On which day shall we visit the Fanta Theme Park in Wuhu this week？–. I will be busy this week.