It is time to go Christmas shopping again.But wait,does　 1　 have to be this way？While some bravely enter the crowded parking lots and ringing registers,　 2　 are saying no to the whole shopping thing and　 3　 (find)ways to revive the original meaning of Christmas giving.In fact,in a recent Ipsos Reid survey conducted(实施) on　 4　 of World Vision,84 percent of Canadians said they would rather have a holiday gift given to a charity in their name　 5　 receive more socks or sweaters.

There is even an　 6　 (organize)encouraging us to have a Buy Nothing Christmas.“It is a national initiative(首创)　 7　 (start)by Mennonites(门诺派教徒) but open to everyone with a thirst for change and a desire for action.” Co?founder Aiden Enns of Winnipeg says.“　 8　 I was working at Adbusters magazine back in 2001,I noticed how successful the Buy Nothing Day campaign was,especially in North America and the UK.?　 9　 a shame that it was only one day,I thought,” says Enns.So he decided to inject a spirit of radical simplicity into the whole Christmas season　 10　 Buy Nothing Christmas was born.　

　If the population of the Earth keeps on　 1　 (increase)at its present rate,there will?　 2　 (event)not be enough resources left to support life on the planet.By the middle of the 21st century,if present trends continue,we　 3　 (use)up all the oil that drive our cars,for example.Even if scientists develop new ways of feeding the human race,the crowded conditions on Earth will make it　 4　 (necessity)for us to look for somewhere else.But　 5　 of the other planets in our solar system are capable of supporting life at present.One possible solution to the problem,?　 6　 ,hasrecentlybeen suggested by an American scientist,Professor Carl Sagan.Sagan believes that　 7　 the Earth^,s resources are completely?　 8　 (exhaust),it will be possible to change the atmosphere of Venus and　 9　 create a new world almost as large as Earth itself.Something is difficult.Venus is much hotter than the Earth.?　 10　 ,there is only a tinyamountof water there.