A：had not been returned
B：has not returned
C：had not returned
D：returned
I was really scared and I didn't know ___________ when I saw a snake that day.
①老舍写的小说《____》，讲述的是旧北京普通的人力车夫祥子的故事。这是老舍最钟爱的作品。
②英国作家____写的《鲁滨孙漂流记》，塑造了一个孤独而顽强的冒险者形象，“鲁滨孙”也成为冒险家的代名词和千千万万读者心目中的英雄。
