--- Do you think we can get to the airport in time? --- Yes, so long as we held up in any traffic jam?
You promised your friend a letter; you ought to ______ days ago.
Tell me how you work out the answer, _______ you?
“ Need he go?” “ Yes, he ______.”
“ Isn’t that Tom playing basketball?” “ It ______ be; he fell off the ladder yesterday and got badly hurt.”
“________ I have a glass of beer?” “ No, I’m afraid you ________.”