No one be more generous；he has a heart of gold. (2013·天津，9)
A. could
B. must
C. dare
D. need
网友回答
A. could
B. must
C. dare
D. need
解析：A
解析 考查情态动词。句意为：没人比他更慷慨；他有一颗金子般的心。“No one could be more generous”是否定词和比较级连用，表达最高级含义，A项could可以在否定句中表示推测，为正确答案。B项表推测，只用在肯定句中；dare和need不符合句意。