It is_______ that I can still remember_______ was discussed at the meeting.
Thanks to the application of new farming methods, the out put is now _____ it was before the year 2000.
— The terrible accident is under investigation. — Actually, quicker action _____ those workers trapped in the mine.
I have been living in the United States for twenty years, but seldom _____ so lonely as now.
In the study of modern science, there are many cases _____ soldiers can teach officers.
— Why didn’t they complete the task in time? — Because it was not until late afternoon _____ they began to solve the major problem.