_______ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.
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.