surprised me most was the suggestion that he .
A. That; should make
B. That; had made
C. What; should make
D. What; had made
网友回答
A. That; should make
B. That; had made
C. What; should make
(答案→)D. What; had made
解析: 句意:最让我惊讶的是他提出的建议。第一空填what,引导主语从句,在主语从句中what做主语,that连接主语从句的时候,只起到连接的作用,不做成分,第二空填had made,因为这里that引导的是定语从句,而且提出建议是在我惊讶之前,用过去完成时,不能用虚拟语气,所以选D。