.–How did you know the surprising news?–I happened ______ the event then.
None knows if _______ that boy, but if _______ him, her parents will be disappointed.
When ______ leave for Japan?” “When ______ leave for Japan is kept secret.”
“Is ______ you want to say?” asked the teacher.
He pointed to ______ looked like a tomb and said, “Ghost.”
After _______ had happened he could not continue to work there.