–ThesefarmershavebeentotheUnitedStates.   –Really?When

問題詳情：

–These farmers have been to the United States.    –Really? When ____ there?

        A. will they go      B. did they go   C. do they go       D. have they gone

【回答】

B

知識點：動詞時態

題型：選擇題