According to the first paragraph, in order to satisfy our energy needs, we need to A．mix all kinds of energies. B．focus on our energy addiction. C．do everything to save energy. D．establish a diversified energy structure.
A.mix B. B．focus C. C．do D. D．establish E.
【参考答案】
D 事实细节题。第一段⑩句Todothat中that指代的就是前一句的satisfyourenergydeman......