We must ________ our task, however hard it is.
. It is usually warm in my hometown in March, but it _________ be rather cold sometimes.
. —What do you think we can do for our aged parents?—You __________ do anything except to be with them and be yourself.
. — My cat’s really fat.— You __________ have given her so much food.
. — What does the sign over there read?—“No person __________ smoke or carry a lighted cigarette,cigar or pipe in this area.”
. I told your friend how to get to the hotel, but perhaps I __________ have driven her there.