—Who are those with the flags?—A group________itself the League for Peace.A.calledB.callsC.callingD.is called
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C解析可以用补全法做题。calling itself 作定语，修饰group, 表示主动关系，故用-ing形式，若去掉itself则用called修饰group，表示被动。本题完整的句子为：They are a group calling itself the League for Peace.