问题补充：
It was by the railway board that the cost of rail fares would be increased by ten percent.
A. noticed
B. stated
C. suggested
D. noted
答案：
A. noticed
(答案→)B. stated
C. suggested
D. noted
解析：state此处意为“（=make sth. know, announce）宣布，通告，声明（口头的或书面的）”，如：It is stated that all the accident were killed.(据宣布，事故中全部人员无一幸免。)suggest建议，是表示欲望意义的动词，从句中要用虚拟语气（should +动词原形）。Note(=notice)“注意到”，如：It was noted that the temperature rose during this time.
