Who ______ it be that is singing in the next room— It _______ be Lucy, but I am not sure.

I just don’t understand _____that leads to so many teenagers becoming addicted to playing computer games. [ ]

Cross the road carefully, __________ you’ll keep yourself safe.— Thank you.

My bike is broken. May I go ________ yours —Sorry, mine __________ broken down.

Not until ________ her dark glasses ___________ she was a famous film star.