GMAT考试写作指导：Argument范文八

　　68. major impediment to the use of solar-powered products is the cost of solar energy and

　　that, given a choice, consumers would prefer products powered by solar energy over

　　those powered by energy derived from coal or oil. On the face of it, this assumption

　　seems acceptable; but it may be that there are other factors besides cost that make solar

　　energy less desirable than other forms of energy.

　　In conclusion, this argument is convincing. To strengthen the argument additional

　　evidence indicating consumer preference for solar-powered products over products

　　powered by conventional forms of energy would be desirable.