Drive slowly, Mary. ______ is something ahead on the road.
He went on talking while I tried to ______ what it meant.
—Your mother becomes more and more forgetful. —Yes. She searched for her cellphone for a whole day last Sunday but it ______ in her coat pocket the next day.
.--Your parents were anxious about you. You _____ home without saying a word. -- It’s my fault.
Hello! I ________ you _______ in London. How long have you been here?
________ is the best student in our class?