It is time we _______(begin)to do our homework.
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If I _______ (have)that chance to show my ability, I would have become the president of this school.
Her suggestion that everybody _______(sing) a songwas not appreciated.
翻译:The professor required that __________________(我们交研究报告)。
翻译:It is absolutely unfair that these children ______(被剥夺了受教育的权利).