She was grateful George all he had done.
A. to; for; that
B. to; for; what
C. for; to; that
D. for; to; what
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(答案→)A. to; for; that
B. to; for; what
C. for; to; that
D. for; to; what
解析： 考察固定句式和定语从句。固定句式be grateful to sb for sth因为某事对某人心怀感激。第二空是一个定语从句，先行词是all，that指代先行词作为动词done的宾语。定语从句中没有what这个关系词。句义：对于George做的所有事情，她非常感激。故A正确。