One day, my two brothers and I were coming back from the islands     1     we often risked going and got more fish than others. All at once, the sky     2    (cover) with clouds and in less than a minute we were in a terrible storm. A huge wave covered our boat and my younger brother     3    (fall) into the sea. My elder brother put his mouth     4    to my ear and cried out “Moskoe-strom!” The moment I heard the word I became very     5    (frighten). I knew what he meant by that one word well enough.

During the polar time of 1910-1911, both teams organized food bases in preparation     6    their journeys the next year. Then came the total     7    (dark) of the polar winter. Scott and Amundsen waited     8    (anxious) for spring.

Amundsen was the first to leave on 8 September, 1911. He had teams of dogs     9    (pull) the sleges and all his men were on skis. Because of this, he made     10    (rapidly) progress. Scott left on l November and soon had problems. First, his two sledges broke down and then the horses began to to have serious     11    (difficulty) with the snow and the cold. After a while, Scott and his men had to push the sledges     12    (them).

In ancient China, many people built walls around their states to protect their land. It was Emperor Qin Shihuang who had the walls     1    (join) up. The project cost much money and hundreds of thousands of people worked on     2     wall. On the top of it, it is wide enough for five horses or ten men     3    (walk) side by side. Along the wall are watchtowers,     4     soldiers used to keep watch.

I’m a new senior secondary school student. I feel excited because this school     5    (different) in many ways from the former one. Previously, we had     6    (fix) classrooms where students sat in rows. But now it is different. We go to different classrooms for different subjects of our own     7    (choose).

In Tibet, she saw an antelope that told her they were being killed     8     mercy by people for their wool and were now an endangered species.     9    (feel) sad, Daisy traveled to Zimbabwe with the carpet to see the elephants there. Much to her relief, the     10    (Africa) living there protected the elephants well and their number was growing.

There     1    (be) a dramatic rise in the number of extreme weather events over the past 20 years,    2    (cause) largely by rising global temperatures,according to a new report from the United Nations. From 2000 to 2019, there were 7,348 major natural disasters around the world,    3    (result) in USD 2,970 billion in economic loss．Much of this increase can be due to climate change. The findings show a critical need     4     (invest) in disaster prevention.

Earth is home to millions of different species. Some can be very small, like bacteria and viruses, which are so small that we cannot see     1     (they) with only our eyes. By contrast, the largest animal species so far found on our planet is the blue whale,     2     can grow up to almost 30 meters in length. The toughest species is probably the water bear. This tiny organism can survive temperatures from 150℃ to a below freezing -272℃.     3     (survive) in their environment, each species has developed its own unique physical characteristics.

Beijing residents woke up to yellow sky on Sunday morning as northern China       1     (hit) by the largest sandstorm of the decade.

Air pollution readings rose to the upper limit of 500 at 8 a.m., according to data from the city's environmental monitory center, as visibility was reduced to     2     (little) than 1,000 meters in parts of the city.

The city's weather bureau advised residents to stay indoors as much as possible, while experts are working to find out     3     the sandstorm came into being.