问题补充：
All that can be said .
A. has been said
B. have been said
C. is said
D. are to be said
答案：
(答案→)A. has been said
B. have been said
C. is said
D. are to be said
解析：考查时态及主谓一致。句意：所有能说的都已经说了。结合语境可知本句描述的是现在已完成的动作，主语all为抽象名词不可数，故谓语动词用单数。All是说的对象，故用被动语态，选A。
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