题目

选择最恰当的选项完成短文 There are lots of rules at Selina's school. She agrees with some of them. For example,they can't arrive1, they can't run in the hallways, andthey can't eat in class. All2rules are okay be-cause they'rereasonable（合理的）. But there are some rules Selina3agree with. For example, at her schoolthey have to wear the school uniform and they can't wear jeans. But she thinksjeans are good because they're comfortable. In school, they can't listen tomusic in the Art class. She thinks listening to music in the Art class is okay. Selina4has to follow some rules为了防盗，在门上装上一个“猫眼”，使屋内的人能看清屋外的人是一个正立缩小的像，屋外面的人却看不清屋内的人，则“猫眼”应该是（ ）A．凸镜B．凹镜C．凹透镜D．凸透镜