Laser is one of the most sensational developments in recent years. 2. We see objects because light comes from them to our eyes. 3. He has the reputation of being a blood-sucker. 4. She has made a reputation for herself through hard work. 5. Preparations for the conference had been plagued by many problems. 6. Air and water are two requirements of all living things. 7. 我知道你现在是进退两难。 8. 他这个人只管自己的事。 9. 你真的是说话不看对象。 10. 我不敢班门弄斧,诚望您发表高见。 11. 敌军闹的全村鸡犬不宁。 12. 真正的好朋友应该雪中送炭。