I__a letter from him since he left for Beijing tomake money.为什么选haven't got

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I__a letter from him since he left for Beijing tomake money.为什么选haven't got
I__a letter from him since he left for Beijing tomake money.
为什么选haven't got

I__a letter from him since he left for Beijing tomake money.为什么选haven't got
因为收信动作是发生在他离开去北京之后的,而文中的“离开”是用的过去时left,所以收信这个动作应该往后推一个时态,而且文中出现了since 那么这个句子就只能用现在完成时态了.