(2013·高考天津卷)No one be more generous; he has a heart of gold.
A. could
B. must
C. dare
D. need
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(答案→)A. could
B. must
C. dare
D. need
解析：选A。句意：“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。