1     human populations grow, animal habitats often begin to     2    . The good news is that in many places around the world, areas are now     3     set aside just     4     animal use. These wildlife     5     allow animals to live in their natural or     6    , habitats. Animals are also     7     in many zoos around the world. Modern zoos keep animals safe and allow scientists to     8     study them. The     9     scientists learn about animals, the more they can do to help protect them and     10     habitats.

Another decision you need to make about housing is     1     by how much you can     2     to pay. Housing prices vary in different areas, such as in a city or a suburban or     3     setting, as well as in different parts of the country. When you have a     4     amount of money to spend     5     housing, location is a very important     6     in deciding     7     kind of home you will be able to afford.

When     8     housing, many people face     9    . They are willing to spend a little more money for a better location, or walk a few blocks more to the bus stop to save on     10    .

When the train arrived at the station, they took a taxi to Lake Louise,     1     the blue water literally took their breath away with its exceptional beauty. They spent the night and then took a coach     2     north through the Canadian Rockies to Jasper. Looking at the beautiful scenery, they both agreed that it was the most     3     journey they had ever taken.

Chen Wei, a high school student in Beijing, had his dinner     1     when he heard someone screaming from another table. A fellow diner at the restaurant, Zhang Tao, was choking on some steak. He was now holding his throat with his face     2     red, while his desperate friends were     3     him on the back.

Thanksgiving is     1     time for tradition and sharing. Even     2     they live far away, family members gather for a     3     at the house of an older relative. All give thanks together for the good things that they have. In this spirit of sharing, civic groups and charitable organizations offer a traditional meal to those in need,     4     the homeless. Turkey, corn, pumpkins and cranberry sauce are symbols which represent the first Thanksgiving. Now all of these symbols are drawn on holiday decorations and greeting cards.

Perhaps no other scientist has had a greater impact     1     China’s aerospace science than Qian Xuesen.     2     by the authors of the Story of Qian Xuesen as a man with “great scientific thought and scientific spirit” who was     3     and served his homeland with effort, achievement, and     4    , Qian was an     5     well-respected man.

Some body language has many different uses. Perhaps the best example is smiling. A smile can help us get     1     difficult situations and find friends in a world of strangers. A smile can     2     down barriers. We can use a smile to apologise, to greet someone, to ask for help, or to start a conversation. Experts suggest     3     at yourself in the mirror to make yourself feel happier and stronger. And if we are feeling down or lonely, there is nothing better than seeing the smiling face of a good friend.