In many countries, ______ is not unusual for families of different backgrounds to live together in the shared space. __
__, in the United States, this idea may still be considered strange.
But this type of housing, ______(call) co-housing, is gaining ___
__ (popular) in the United States, too. Co-housing complexes are popping up across the country. For many people, this way of life is a relief to the busy modern lifestyle. A co-housing community has __
___ (private) owned houses and shared land. There is often a “common house” with _
___ kitchen and dining room, meeting room, and maybe a workshop of library or music room. About 25 co-housing communities __
__ (build) in recent years, and 150 more are planned.
A co-housing complex is a place ____ residents shop, cook, and eat together. Residents of a co-housing complex like its sense of shared community. Children have other kids to play __
__, which many families like. Other residents like the feeling of living in a “village”. Residents also say that they can live in co-housing for __
___ money than they would pay for nearby apartments.
It seemed that the water led to cholera．John Snow looked into the source of the water for these two streets．He found that it came from the river, had been polluted by the dirty water from London．Immediately John Snow told the astonished people in Broad Street to remove the handle from the water pump so it could not be used．Soon the disease began to slow
．
John Snow had shown that cholera was spread by germs and not in a cloud of gas．___addition, he found two other deaths in another part of London that were concerned with the Broad Street outbreak．A woman, who had moved away from Broad Street, liked the water so much that she had had it delivered from the pump to her house every day．
Technological developments have also played their part ______ keeping Valentine’s Day relevant in the 21st century. Valentine’s ecards have been very popular in recent years.
Now，Valentine’s Day is celebrated in many countries around the world. However, the traditions often differ from place to place.
In Japan，for example，it is normal _______the woman to send chocolates to the man, ___
___in South Korea April 14th is known as “Black Day” and is when the unfortunate men who received nothing on Valentine’s Day gather to eat noodles and show sympathy for each other.
_______is believed that he tried to find comfort from his imprisonment by writing love poems to his wife.
Nobody knows exactly ________St.Valentine was，although some historians suggest he was ___
___Roman killed in the third century AD by a Roman Emperor.