问题补充:
He took the machine to pieces to find out how it .
A. progressed
B. operated
C. equipped
D. managed
答案:
A. progressed
(答案→)B. operated
C. equipped
D. managed
解析:词义辨析。Progresse前进,进步; operate操作,经营;equip装备,配备;manage经营,处理;句意:他把机器拆成一块一块的来查明他如何操作。故选B。