---What’s made Ruth so upset?--- ______ three tickets to the folk music concert.
Had they known what was coming next, they ________ second thoughts.
Grace doesn't want to move to New York because she thinks if she ________ there, she wouldn't be able to see her parents very often.
If he had spent more time practising speaking English before, he ________ able to speak it much better now.
If we ________ a table earlier, we wouldn't be standing here in a queue.
—Where ________ Mary have put the empty bottles?—She ________ them away. They must be somewhere.