The bus (A) was plenty of people who had spent (B) many a happy hour in the stores (C) doing (D) their Christmas shopping.Đoạn văn14/88The bus (A) was plenty of people who had spent (B) many a happy hour in the stores (C) doing (D) their Christmas shopping.was plenty ofmany a happy hourdoingtheirGiải thíchChọn A