Chemistry Senior High about 4 yearsago 完了進行形の問題です。 答えは①です ②ではダメな理由を教えてほしいです🙇♀️ 000 SUDUTA 17 We() for nearly thirty minutes when the train arrived. had been waiting 3 have waited 2 have been waiting 4 will have waited 200 st Solved Answers: 1
