A terrible earthquake hit the city of Tangshan on July 28, 1976, in which thousands of people died and many     1    (injure). Many houses fell down and sand filled the wells instead of water. People were greatly shocked. All the electricity in the city was cut     2    and people started to wonder how long the disaster would last. The whole city was     3    (complete) destroyed and the world seemed at     4    (it) end.

The people of Tangshan didn’t lose hope, because 150,000 soldiers were sent     5    (help) the rescue workers. The soldiers tried their best to dig out those     6    were trapped. Workers built shelters for the     7    (survive). Fresh water was taken to the city by every means. Slowly, the city started to come back to life.

It was said that before the quake, strange things were happening in     8    countryside. The water in the village wells     9    (rise) and fell. Fish jumped out of the ponds. Strange noises were heard in the sky,    10    people thought little of them.

3 . When you think of the Arctic, you imagine an icy land of pure white snow, which is considered to be the last really clean place     1    (leave) on Earth. Yet plastic trash has now reached the remote regions of the Arctic and the Alps. A team of     2    (scientist) has discovered large quantities of microplastics(微塑料) — very small pieces of plastic waste — in the Arctic snow. While microplastics have been found in sea-water, drinking water, and even in animals over     3     past several years, this is the first study to show microplastics in snow,     4     indicates it is an airborne pollutant that must be paid attention to. 

The researchers state that microplastics in snow suggest that microplastics may be in the air that we     5    (breath). Therefore, it is really important     6    (assess) if microplastics also reach lung tissues.

Previous research has found that they flow over long distances and into our oceans,     7    (damage) ecosystems along the way. They start in our wastewater, when we wash clothes     8     plastic fibers. The wastewater then flows into rivers and out to sea, where they     9    (eat) by sea animals. If people then eat these animals, it means that we’re     10    (probable) eating the plastic as well.