—useful suggestion he offered to us!—You’re right. It was of great.A. How valueB. What v

问题补充：

—useful suggestion he offered to us!

—You’re right. It was of great.

A. How, value

B. What, value

C. What a, value

D. What a, valuable

答案：

A. How, value

B. What, value

(答案→)C. What a, value

D. What a, valuable

解析：感叹句主要有what和how构成：

1、what修饰名词或名词短语，有以下两种形式： 1. What+a(an)+（形容词）+单数可数名词+主语+谓语！或是：What+名词词组+主语+谓语！ 2. What+(形容词）+可数名词复数或不可数名词+主语+谓语！

2、How引导的感叹句。 how用来修饰形容词、副词或动词。其结构是：How+形容词（副词）+主语+谓语！

根据下文useful suggestion，及of great可知选A，名词作介词of的宾语。