It was lucky that little Jack was not at home when the fire broke out;otherwise,he his life.
He _____ his parents that he has failed in the exam.
—The poor people lived near the highway.—_____ very noisy.
As is natural, a man as old as he ______ be very forgetful.
You _____ pay too much attention to your reading skill, as it is so important.
I _____ have written to him because he phoned me shortly afterwards.