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______________ you _________________ ( 过去常常 ) go swimming in the river when you were young? He used to _____________________ ( 打篮球 ). It ’ s the second time that he _____________________ ( 跟她一起出去 ). I didn ’ t ___________________________ ( 意识到团队协作的重要性 ) until I became the monitor of our class. He _____________________ ( 好好学习 ) since he came to our school.