Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

Forests in the northern half of the globe could be growing faster now than they were 200 years ago as a result of climate change, according to a study of trees in eastern America. The trees appear to have faster growth rates due to longer growing seasons and higher concentrations (浓度) of carbon dioxide in the ___41___.

Geoffrey Parker, a scientist at the Smithsonian Environmental Research Centre in Edgewater. Maryland, said that the increase ha the rate of growth was unexpected and might be ___42___ to the higher temperatures and longer growing seasons documented in the region. The growth may also be influenced by the significant ___43___ in atmospheric CO2, he said.

"We made a list of reasons these forests could be growing faster and then excluded half of them," Dr. Parker said. Their study suggests that northern forests may become increasingly important in ___44___ the influence of man-made CO2 on the climate.

Dr. Parker and his colleagues have ___45___ out a detailed record of the trees on a(n) ___46___ basis since 1987. They calculated that due to the global warming the forest is producing   ___47___ tons of wood each year.

The scientists ___48___ the land with trees at different stages of growth and found that both young and old trees were showing increased growth rate. More than 90 per cent of the tree groups had grown by between two and four times faster than the scientists had ___49___ from estimates of the long-term rates of growth.

Complete the following passage by using the words in the box．Each word can only be used once．Note that there is one word more than you need．

Barack Obama has been a hit in China．Apart from holding talks with Chinese leaders, the president ___1___ the Chinese with a lively question-and-answer session with college students．In fact, he is the first U.S．president to visit China inside his first year in office.

“The United States insists we do not seek to contain China’s rise,” he told Chinese students in Shanghai．“On the contrary, we welcome China as a strong and ___2___ and successful member of the community of nations.”

The U.S.-China relationship has opened the door to partnerships on ___3 ___ global concerns including economic recovery, clean energy, climate change, and the ___4___ of peace and beyond, he added.

Indeed, given these pressing issues, China and the United States have ___5___ found their future linked together．They discovered that the largest developing nation and the most powerful industrialized country have to work in concert.

Obama’s visit to China on November 15-18 highlighted the complexity of arguably the most important bilateral （双边） relationship in the world．Moreover, for all their differences and disagreements, Beijing and Washington are ___6___ to manage their relations in a way that will contribute to world peace and development.

Obama kicked off his first state visit to China in the country’s financial and economic centre, Shanghai, where he held a “town hall” meeting with more than 500 Chinese students．The one-hour discussion, during which Obama took ___7___ ranging from antiterrorism to recipes for success with his signature charisma （领袖魅力）, was broadcast live on the websites.

He ___8___ that young people could help build bridges in U.S.-China ___9___ — a process that he said must grow beyond the two countries’ governments to take root in the people.

Complete the following passage by using the words in the box．Each word can only be used once．Note that there is one word more than you need．

Forests in the northern half of the globe could be growing faster now than they were 200 years ago as a result of climate change, according to a study of trees in eastern America．The trees appear to have faster growth rates due to longer growing seasons and higher concentrations （浓度） of carbon dioxide in the 1  ．

Geoffrey Parker, a scientist at the Smithsonian Environmental Research Centre in Edgewater．Maryland, said that the increase in the rate of growth was unexpected and might be   2   to the higher temperatures and longer growing seasons documented in the region．The growth may also be influenced by the significant    3   in atmospheric CO₂,he said．

"We made a list of reasons these forests could be growing faster and then excluded half of them," Dr Parker said．Their study suggests that northern forests may become increasingly important in  4    the influence of man-made CO₂ on the climate．

    Dr Parker and his colleagues have   5   out a detailed record of the trees on a（n）   6 basis since 1987．They calculated that due to the global warming the forest is producing   7  tons of wood each year．

The scientists _ 8 _ the land with trees at different stages of growth and found that both young and old trees were showing increased growth rate．More than 90 per cent of the tree groups had grown by between two and four times faster than the scientists had   9   from estimates of the long-term rates of growth．

Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

Barack Obama has been a hit in China. Apart from holding talks with Chinese leaders, the president ___41___ the Chinese with a lively question-and-answer session with college students. In fact, he is the first U.S. president to visit China inside his first year in office.

“The United States insists we do not seek to contain China’s rise,” he told Chinese students in Shanghai. “On the contrary, we welcome China as a strong and ___42___ and successful member of the community of nations.”

The U.S.-China relationship has opened the door to partnerships on ___43 ___ global concerns including economic recovery, clean energy, climate change, and the ___44___ of peace and beyond, he added.

Indeed, given these pressing issues, China and the United States have ___45___ found their future linked together. They discovered that the largest developing nation and the most powerful industrialized country have to work in concert.

Obama’s visit to China on November 15-18 highlighted the complexity of arguably the most important bilateral (双边) relationship in the world. Moreover, for all their differences and disagreements, Beijing and Washington are ___46___ to manage their relations in a way that will contribute to world peace and development.

Obama kicked off his first state visit to China in the country’s financial and economic centre, Shanghai, where he held a “town hall” meeting with more than 500 Chinese students. The one-hour discussion, during which Obama took ___47___ ranging from antiterrorism to recipes for success with his signature charisma (领袖魅力), was broadcast live on the websites.

He ___48___ that young people could help build bridges in U.S.-China ___49___ — a process that he said must grow beyond the two countries’ governments to take root in the people.

Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

Forests in the northern half of the globe could be growing faster now than they were 200 years ago as a result of climate change, according to a study of trees in eastern America. The trees appear to have faster growth rates due to longer growing seasons and higher concentrations (浓度) of carbon dioxide in the ___1.___.

Geoffrey Parker, a scientist at the Smithsonian Environmental Research Centre in Edgewater. Maryland, said that the increase ha the rate of growth was unexpected and might be ___2.___ to the higher temperatures and longer growing seasons documented in the region. The growth may also be influenced by the significant ___3.___ in atmospheric CO₂, he said.

"We made a list of reasons these forests could be growing faster and then excluded half of them," Dr. Parker said. Their study suggests that northern forests may become increasingly important in ___4.___ the influence of man-made CO₂ on the climate.

Dr. Parker and his colleagues have ___5.___ out a detailed record of the trees on a(n) ___6.___ basis since 1987. They calculated that due to the global warming the forest is producing   ___7.___ tons of wood each year.

The scientists ___8.___ the land with trees at different stages of growth and found that both young and old trees were showing increased growth rate. More than 90 per cent of the tree groups had grown by between two and four times faster than the scientists had ___9.___ from estimates of the long-term rates of growth.