The hard-working peasants and their happy life _____ we saw in the countryside made a wonderful impression on us.
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.
Sir, you ______ be sitting in this waiting room. It is for women and children only.
He hurt his leg climbing the mountain; otherwise, he _____ the meeting.