All the travelling fare, unless specifically stated _________, includes admission charges to the attractions, shows and exhibitions we visit.

_____ I had done it I knew I had made a mistake.

--- Do you think it’s a good idea to make friends with your students？--- _____, I do. I think it’s a great idea.

The members of the board are discussing the problem right now; it will _____ have been solved by the end of next week．

“If you’re walking down the right path and you’re willing to keep walking,_____ you’ll make progress”, said the president Obama.