How are the kids spending their childhood? I can’t help recalling(回忆)that there was a time _______ we played happily and freely in the outside.
– I won’t do it any more. --_______?
-- My cat’s really fat. --- You ______ have given her so much food.
If you had told me in advance, I ___ him at the airport.
--Excuse me, could you tell me the way to the British Museum? ---Sorry, I'm a stranger here. ---_______.
I wish I ___ able to tell him all about it last night.