China’s research icebreaker Xuelong,     1     126 crew members aboard on the 35th Antarctic research mission, on Thursday local time left the Zhongshan Station on     2     (it) way back to China.

Snow Eagle 601, China’s first fixed­wing aircraft for polar flight, on Thursday night also departed from the Antarctic after     3     (complete)all assignments.

Xuelong,     4     arrived near Zhongshan on Feb. 9, supplied the station with fuel oil, and then picked up summer expedition   team members   at   the   Kunlun, Taishan and Zhongshan stations, as well as     5    (member)of the fixed­wing aircraft project.

Sixteen members of the Kunlun team     6    (previous)completed all scientific expeditions at Dome Argus (Dome A), the South Pole’s highest icecap. They，together with 21 members of the Taishan team,     7    (return)to Zhongshan on Feb. 8.

The Zhongshan team completed tasks including installation of and tests for LiDAR, drilling of ice bedrock, atmospheric sounding     8    (observe)，surveys of birds and aerial exploration carried out by the fixed­wing aircraft.

As the summer expedition team at Zhongshan left, 19 members would stay for winter expeditions.

Also     9    (know) as the Snow Dragon, the icebreaker carrying a research   team   set   sail   from Shanghai on Nov. 2   last year, beginning     10     country’s 35th Antarctic expedition. It is expected to arrive in Shanghai in mid­March.

The poor villagers of Yaluma in Southern Mexico now have an extra source of income. They are being paid to grow and develop forests by the    1    (organize) in charge of Formula One racing,    2    pumps 5,500 tons of carbon dioxide(CO₂)into the air every year.

Projects like this    3    (go) under the name of “carbon trading”. The basic idea is that governments and companies can buy the right to pump CO₂ into the air by investing in green projects. They can buy so-called “carbon credits” from countries with CO₂ emissions(排放物)successfully    4    (reduce).

Supporters of carbon trading say that it provides a new way of doing business and brings money and green technology    5    poorer countries. while opponents(反对者)argue that nature comes before lifestyle. CO₂ emissions need to be reduced, not bought and sold. People should not help the rich countries keep a lifestyle    6    (depend) on pollution.

It is believed that modern    7    (life) are about choice. We can choose to take the danger of global warming seriously. And    8    sooner we choose to do it, the more choices we have about what    9    (do) next and the more time we have to do it in. We can also choose to pay no attention to the danger of global warming to keep    10    (we) lifestyles. Then one day nature may give us no choice at all.