mistaken, _____ you are mistakentoo.

If you ________a crime，you can never escape being punished.

—Why do you look so worried?—My computer broke down and my essay ________ unfinished since.[ ]

Listen! Sally is singing in that room.– It ______ be sally. She has gone to Paris.

The police officers decided to conduct a thorough and _______ review of the case.