单选题 The inventor ______ his original design in order to increase the machine's efficiency.
A. executed B. modified C. cultivated D. decorated

【正确答案】 B
【答案解析】[解析] 动词词义辨析题。B modify：修改，更改。A execute：实施，执行；处死。C cultivate：栽培，养殖；教育。D decorate：装饰，装修。