单选题 The trainees were given copies of a finished manual to see whether they could themselves begin to ______ the inflexible, though tacit, rules for composing more of such instructional materials.
A. design B. revise C. disrupt D. derive

【正确答案】 D
【答案解析】(derive得到，获得)。句意为：给接受培训的人分发了一些印好的小册子，看他们是否能亲自从中得出一些不言而喻的但不可更改的规则，以创作出更多此类的教材。A． design设计；B．revise修订；C．disrupt分裂。