spot questions

例句：

1. 1. He spotted the thief in the crowd and called for help.
   他在人群中发现了小偷并呼叫帮助。
2. 2. The teacher pointed out the mistake in the math problem.
   老师指出了数学问题中的错误。
3. 3. She recognized the voice of her old friend on the phone.
   她认出了电话上老朋友的声音。
4. 4. They located the lost dog by following its trail.
   他们通过追踪狗的踪迹找到了丢失的狗。
5. 5. The scientist discovered a new species of plant in the Amazon rainforest.
   科学家在亚马逊雨林中发现了一种新物种的植物。
6. 6. The artist identified the painting as a masterpiece.
   艺术家确认这幅画是一幅杰作。
7. 7. The doctor spotted a small tumor in his patient's arm.
   医生在他的病人手臂上发现了一个小肿瘤。
8. 8. The police officer noticed a suspicious person in the park.
   警察注意到公园里一个可疑的人。
9. 9. The engineer spotted a crack in the building's foundation.
   工程师在建筑物的基础中发现了裂缝。
10. 10. The detective spotted the suspect hiding behind the bushes.
    侦探在灌木丛后面发现了嫌疑人。