第13题: [单项选择]They claimed that they did not arrange the demonstration. It was absolutely _______. A. spontaneous B. simultaneous C. synthetic D. substantial 参考答案:A 答案解析:此题考查形近义异的形容词词义。spontaneous自发的非强制的,符合题意。simultaneous,同时发生的同步的,与A项形近,注意不要混淆。synthetic综合的:合成的:人造的。subst