The students and their parents have repeatedly __________ to the school board about heavy work assignments. ( 章节：3 难度：3)_做题室

单项选择题The students and their parents have repeatedly __________ to the school board about heavy work assignments. ( 章节：3 难度：3): A、told; B、complained; C、said; D、explained

正确答案：B
答案解析：
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