现在完成时的练习单项选择1、’ 、Hehas_______beentoShanghai,hashe?、?、、—Ourcountry______alotsofar. —;;;;better6、;;;;studying7、、、—ThesefarmershavebeentotheUnitedStates—Really?When_____there?、—______you___yourhomeworkyet? —;do;;done;;done;;do;finish11、、—Doyouknowhimwell? —、—Howlonghaveyou____here? —、Hurryup!、、MissGreenisn'、Myparents___
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