Strange things happened in Tangshan. ____ three days, water in the wells kept ____ (rise) and falling. ____ (smell) gas came out from the cracks of wells. Animals became ____ (nerve). There were other signs of an earthquake but the people thought little of these events. At 3: 42 a. m., everything began to shake. The world seemed ____ (be) at an end. One-third of the nation felt the ____ (great) earthquake. In fifteen seconds the city lay ruins. Two-thirds of the people died or ____ (injure). Thousands of families were killed and many children were left ____ parents. Then later that afternoon, ____ big quake shook Tangshan. People began to wonder how long the disaster would last. ____ all hope was not lost. Soldiers came to help the rescue work. Slowly, the city began to breathe again.

  带“翅膀”的槭树果实    水力传播

  坚硬、能浮的莲蓬果实    动物传播

  长倒刺的鬼针草果实    弹射传播

  干而脆的牵牛花果实    风力传播

  随风而飞的蒲公英种子