Fill in the blanks with the words or phrases that best complete the sentences and are most appropriate for the situation. (1) __________ the quality of your products is satisfactory, the price should not be 20 percent higher than the prevailing market price. (but, although) (2) If you have a problem with your camera and cannot find the answer in the User’s Guide, you may receive 24-hour personal assistance ________ the following toll-free number: 800-266-7588. (at, from) (3) Because you have always paid your account promptly in the past, we are sure that you will want to ________ this balance immediately. (pay, settle) (4) You ________ not pay attention only to the price, but must take the quality into consideration, too. (must, should) (5) Lisa was a nice person, and her former employer provided a ________ for her when she applied for a new job. (reference, guide) (6) To give you a better understanding of our products, I’m sending you some of our leaflets in a ________ package. (single, separate) (7) We have the pleasure to announce that we have just established ________ as commission merchants for PC security devices at the above address. (us, ourselves) (8) Your warranty will be validated ________ you return your owner’s registration. (as soon as, on the condition that) (9) ________ market research is insufficient, sales are poor in the Northwest this year. (due to the fact that, because) (10) Thank you for your inquiry. ______________, we have stopped producing the MAX-IU series because sales were rather disappointing. (unfortunately, certainly)