问题补充：
As for the accident this time, I think it is Richard you, to blame.
A. more than; are
B. less than; who are
C. rather than; that is
D. rather than; is
答案：
A. more than; are
B. less than; who are
(答案→)C. rather than; that is
D. rather than; is
解析： 考查强调句型及主谓一致。more than;多于，不仅仅，less than，少于，rather than而不是，句意：关于这次的意外事故，我认为是Richard，而不是你应受责怪。rather than连接两个主语时，谓语动词取决于前者，be to blame应受责怪，主动表被动。故选C。
