用现在完成时或现在完成进行时填空

用现在完成时或现在完成进行时填空
I _______________________(wait) in the cold for 45 minutes.
I _______________________(check) the article since this morning.
I _______________________(check) 50 articles.
知了thy 1年前 已收到1个回答 举报

ljmharvard 幼苗

共回答了21个问题采纳率:95.2% 举报

have been waiting
have been checking
have checked

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