1 . Humans evolved from apes. This is what we learned in biology class. But what came before apes? Chinese scientists have discovered fossils that could enrich the evolutionary story of how humans evolved from fish.

According to four articles published in the journal Nature in late September, Chinese researchers found fish fossils that provide the “missing link” about the origin of the jaw, a key feature that 99.8 percent of vertebrate (脊椎动物) species have.

Zhu Min, a lead researcher of the studies from the Chinese Academy of Sciences, said that the findings drew a large amount of interest in the science world due to the importance of jaws in animal evolution.

However, the rise of the jaw had been a mystery due to a lack of sufficient fossil evidence to support that jawed vertebrates lived 450 million years ago.

The latest findings made by Zhu’s team presented a set of five surprisingly well-preserved fish fossils that included three whole-bodied fish, helping scientists paint a more accurate evolutionary picture of the origin of the jaw. The fish fossils were discovered at two sites in Chongqing and Guizhou, whose strata (岩层) date back to the Silurian Period that began around 440 million years ago.

These fossils show that jawed fish were already thriving (繁荣) in the world’s ancient oceans at that time. Later on, more diverse and larger jawed fish evolved and began to spread around the world, paving the way for some fish to eventually go on land and evolve into other animals — including humans.

“These fossils provide an unprecedented (前所未有的) opportunity to peek into the ‘dawn of fish’ and help scientists trace many human body structures back to these ancient fish thus filling some key gaps in the evolutionary history of how fish evolved into humans,” Zhu said.

1. In which column of a magazine will you most probably read the passage?

A．Your Voice.	B．Animals.
C．Science Study.	D．History.

2. Why did the findings draw a large amount of interest in the science world?

A．Because jaws are a key trait of all vertebrate species.

B．Because jaws are significant in animal evolution.

C．Because the rise of the jaw had been a mystery.

D．Because there is a lack of sufficient evidence.

3. What does the underlined phrase “at that time” refer to?

A．Around 440 million years ago.

B．Around 450 million years ago.

C．When jawed fish began to spread around the world.

D．When fish evolved into humans.

4. Which of the following is a suitable title for the text?

A．Who Are Our Ancestors?	B．What Came Before Apes?
C．The Origin of the Jaw	D．Key Gaps in Evolution

2 . 阅读下面短文，在空白处填入 1个适当的单词或括号内单词的正确形式。

Longjing tea,     1     has topped the list of the ten most famous teas in China with its color, taste and shape,     2    (name) after its production region --- Longjing Village of West Lake. The good environment and water resources have contributed much to the     3    (grow) of the tea, confirming the saying that "Longjing tea is the     4     (good) among all of the teas in the world".

Thanks     5     Emperor Qianlong of the Qing Dynasty, the tea has earned a high reputation. The story went that Emperor Qianlong visited the mountain during his Hangzhou travels, and he saw some ladies picking the tea at     6     foot of the mountain. He was so interested in their movements that he decided to have a go himself. While     7    (pick) the tea, he received the news of his mother's illness, so he carelessly put the leaves in his right sleeve and    8    (leave) Hangzhou for Beijing. He visited his mother    9    (immediate) upon his arrival in Beijing, and his mother smelt the fragrance of the tea leaves from his sleeves and wanted to have a taste. After drinking a cup of tea, she found herself completely    10    (refresh), and she even praised it as a cure for all ills. From then on, it was listed as the tribute tea.