"Where is it?" "Where is ____? I don't know what do you mean?"

Jack, have you ____ your mid-term examination?

---Tom is so worried about the test that he said he was going to study all night.----Tell him he should quit _________and get some help. 

It was dark, so we decided to ______ for the night at the farmhouse.

The boy said that he had _________ the pen on the desk, but I thought he ________ to me.