2、Exactly when the first people arrived in __1__ as California, no one really knows．

Scientists believe that these first setters crossed the Berlin Strait from Asia to Alaska __2__ of a land bridge．

Thousands were killed or __3__ slavery．__4__, many __5__ brought by Europeans．

Cloning has two __6__．Firstly, Secondly, it is valuable for research on __7__ and for medical research on animals．Many __8__ to clone mammals failed. But at last the __9__ of the scientists was rewarded in 1996 __10__— the cloning of Dolly the sheep．

2、1．what we now know   2．by means of   3．forced into   4．In addition   5．died from  6．major uses  7．new plant species    8．a(chǎn)ttempts      9．determination and patience   10．with a breakthrough

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科目：高中英語 來源： 題型：

Exactly when the first people arrived in __1__ as California, no one really knows．

Scientists believe that these first setters crossed the Berlin Strait from Asia to Alaska __2__ of a land bridge．

Thousands were killed or __3__ slavery．__4__, many __5__ brought by Europeans．

Cloning has two __6__．Firstly, Secondly, it is valuable for research on __7__ and for medical research on animals．Many __8__ to clone mammals failed. But at last the __9__ of the scientists was rewarded in 1996 __10__— the cloning of Dolly the sheep．

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科目：高中英語 來源： 題型：

Exactly when the first people arrived in __1__ as California, no one really knows．

Scientists believe that these first setters crossed the Berlin Strait from Asia to Alaska __2__ of a land bridge．

Thousands were killed or __3__ slavery．__4__, many __5__ brought by Europeans．

Cloning has two __6__．Firstly, … Secondly, it is valuable for research on __7__ and for medical research on animals．… Many __8__ to clone mammals failed. But at last the __9__ of the scientists was rewarded in 1996 __10__— the cloning of Dolly the sheep．

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科目：高中英語 來源：湖南省岳陽一中2012屆高三上學(xué)期第三次月考英語試題 題型：053

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　　Exactly when the first people arrived in 　　1　　 as California, no one really knows．

　　Scientists believe that these first setters crossed the Berlin Strait from Asia to Alaska 　　2　　 of a land bridge．

　　Thousands were killed or 　　3　　 slavery．　　4　　, many 　　5　　 brought by Europeans．

　　Cloning has two 　　6　　．Firstly,…Secondly, it is valuable for research on 　　7　　 and for medical research on animals．…Many 　　8　　 to clone mammals failed．But at last the 　　9　　 of the scientists was rewarded in 1996 　　10　　－the cloning of Dolly the sheep．

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