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3)a)(x)An advertisement
b)(x)To sell a machine
c)(x)Different kinds of fonts(typeface of letters)are used.
(x)There ir a picture
(x)The price of the equipment is sometimes informed.
d)It was made before, because of their appearance, why not use more machines of this type

4)b)Compact,beauty,grace
c)Durable, never gets out of order
d)perfect,the best,simpolicity,improved,no rival,elegance.