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She promised she --do better work.Awould B willC shall D is going to

题目详情
She promised she --do better work.Awould B willC shall D is going to
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答案和解析
选A ,前面的promised,表明了时态为过去时,所以后面的宾语从句也要用过去时,所以选A.
这句话的意思是:她承诺过她会做的更好.