题目
By the time your plane lands tonight ,I____at the airport for 3 hours
A had waited
B have been waited
C had been waiting
D will have been waiting
为什么是D,for 3 hours不是完成时态的标志吗?
A had waited
B have been waited
C had been waiting
D will have been waiting
为什么是D,for 3 hours不是完成时态的标志吗?
提问时间：2021-01-22
答案
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