David has gone to the United States for vacation?can you tell me when he ______?A.has left B.lef

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DavidhasgonetotheUnitedStatesforvacation?canyoutellmewhenhe______?A.hasleftB.lefDavidhasgonetotheUni

David has gone to the United States for vacation?can you tell me when he ______?A.has left B.lef
David has gone to the United States for vacation?can you tell me when he ______?A.has left B.lef

David has gone to the United States for vacation?can you tell me when he ______?A.has left B.lef
选b,left

选 B Left

B 问的是时间 那个点发生的动作

选B。前面现在完成时。一般和过去时放在一起。表示已经发生的事情对现在的影响。