The passengers on the bus watched with sympathy as Susan made her way① carefully up the steps.She paid the driver and then，using her hands to __31__由下文知Susan是盲人，所以应是用手摸着找座位。 the seats，settled② in one of them.
It had been a year since Susan became blind.为31题提供暗示，为32题设伏。 As the result of an accident she was suddenly thrown into a world of __32__.事故后，Susan失明，突然被抛进了一个黑暗的世界。
