"Why was Fred so upset?" "He isn't used _______ criticized." ( 章节：2 难度：3)_做题室

单项选择题"Why was Fred so upset?" "He isn't used _______ criticized." ( 章节：2 难度：3): A、be; B、to be; C、to being; D、having been

正确答案：C
答案解析：
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