a. for b. about c.on d. to e. for f. to g. of h. with i.to j. of 38. Our customers have been complaining - our prices since we put them up. 39. Our export sales account 45% of our total turnover. 40. The recession has had a serious effect our specialised market. 41. With reference _your last letter, we are pleased to enclose the requested documents. 42. The best we can hope is to break even this year. 43. We need to find an alternative our current supplier. 44. We are not aware _any problems with their business. 45. We have an excellent relationship all our suppliers. 46. At the meeting we found a solution the production problem. 47. We learned his award through the company newsletter