【分析解答题】

Mr. Davidson works hardly every day and he is a model worker . . . hard. . .

Dear Mrs. David, 
I received your letter dated December the 21st complaining 
41. about the qualify of our TL135 camera! checked with our 
42. manager and I am now answer your questions: Your can mail 
43. the flawed camera to us and paying the postage by yourself. Then 
44. upon receiving your package, we'll immediate send you a new one. 
45. And the postage is on us. I look forward to hear from you. 
Thank your for your letter.