Another 20% worked well , but the remaining 60% should have been

Another 20% worked well , but the remaining 60% should have been scrapped.
A、scratched
B、renovated
C、stimulated
D、introduced
【正确答案】：B
【题目解析】：句意:另外的20%操作良好，但其余60%早该报废了。scrap 在句中的意思是“废弃”。选项中scratch意为“刮，抓”;renovate意为“修复”;stimulate意为“刺激”;introduce意为“介绍”。故本题选B。