is supposed to have done 跟 was supposed to do 的有区别吗,

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• is supposed to have done 跟 was supposed to do 的有区别吗,
• 完成句子.I'm so sorry______at such an awkward time,but I really had something urgent to tell you.(call)我真的很抱歉在这么不合适的时间给你打电话,但我真的有急事告诉你.have called you,请问为什么要用have done,不能只用do吗How can you ask again?I think_____at all when I presented the answer to you.(listen)你怎能再问一遍?我认为当时我在讲解答案时你根本没听.答案是you were not listening,请问为什么不用情态动词表推测?
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