单选题 Robert wanted to 1 . 2 he was ready, he got on his bike and left for the cinema. Suddenly, he 3 sirens(警笛). The sound was getting 4 . He looked 5 him to see what was happening. As a result(结果), he 6 off his bike and lay on the road. Luckily, he wasn"t hurt, 7 a car hit his bike. After the car 8 , two men got out and started running. 9 , a police car stopped and three policemen got out and started running after the men, shouting, "Stop the thieves(赋)!" A policeman came to see Robert. He thanked him because he had helped them 10 .