III. Each of the lines in the following passage has a mistake. Find and correct it.
31. In order to request telephone service in the United States, either call nor visit your local
32. telephone store. A sales representative will be glad showing you samples of the designs and colors
33. available. Simple choose the design and color that you prefer, and leave your name, and address
34. and employer's name with the sales representative. Students with scholarships should provide his
35. sponsor's name instead with employer's name
36. A fifty dollars security deposit must be paid prior to telephone installation, and may be paid by
37. cheque, cash or mastercard. In the date that your telephone is to be installed, a respomsible
38. person such as an apartment manager, must be at home to lock the door for the serviceman.