1, I wish I hadn’t bought any tickets for the concert.
2, Do you mind putting the chair away?
3, So far I have been writing five pages.
4, I haven’t made up my mind about continuing my study in a foreign country.
5, It was foolish of him to say that.
6, The car was too expensive for him to buy.
7, Such a disappointing feeling Fiona had that she could not keep on working.
8, He was kept waiting for two hours.
9, It was not until he came into the room that I recognized him.
10, Had it not been for Lan's help, I would have been unable to finish the project.