33Only after he had spent several nights working on the math problem_______to wonder whether the problem was wrongly set　　　　

Jenny, you have got the first prize inthe competition. Congratulations.— .

All his friends and relatives came to ______ him on his daughter’s being admitted to Qin Hua University.

Lucy has changed a lot since she got her new jobRecently she ________ her work quite well

She packed______ her job, and went off to Qingdao for the Navy celebration.