You can be sure of _____ you have at present ; you cannot be sure of something_______you might get in the future .
. “Have a drink?” “No thanks, _____.”
. “We‘ve missed the train!” “_____, there’ll be another in ten minutes.”
. “Would you mind telling her the news?” “_____, but I don’t know if I _____ her these days.”
. “May I borrow your paper?” “ ______.”
. He pushed his way through the crowd, saying “_____.”