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. being invited 4 .Bebecca was unhappy for _____ the first chance to go abroad. A. not having been given B. not having given C. not giving D. having been given 5 .By _____, water can be changed into gas. heated heated classroom wants __________. A. clean clean it sounds a bit too dear(昂貴 ),it is worth _________. A. being bought B. buying C. to buy D. buying it Xray machine needs_________. A. repairing B. to repair C. repaired D. being repaired officers narrowly escaped ________ in