Pham Tuan said everything quite strange although he ... when he was on the ground12/15Choose the best answer A, B, C or D to complete the sentences. Pham Tuan said everything quite strange although he ……….. when he was on the ground.preparedhas preparedhad preparedpreparedGiải thíchĐáp án: C Hành động xảy ra trước một hành động trong quá khứ