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The United States government wants to know what the public thinks about its findings on the safety of cloned animals ．
The Food and Drug Administration says meat and milk from clones of adult animals
are safe to eat ． They called them“as safe to eat as the food we eat every day” ．
And when those clones reproduce sexually( 有性繁殖 ) ， the agency says ， their offspring( 后代 ) are safe to eat as well ．
The United States this year could become the first country to allow the sale of foods from cloned animals ．
First ， however ， the publlc wiIl have ninety days to comment on three proposed
documents ． On December 28 th the F ． D ． A ． released a long report ， called a draft risk assessment ， along with two policy documents ．
The agency says it must receive comments by April second ． The F ． D ． A ． seemed
ready to act several years ago ， but an advisory committee called for more research ．
For now ， the government will continue to ask producers to honor a request that
they not sell foods from cloned animals ．
Clones are still rare ． They cost a lot and are difficult to produce ． ·
The F ． D ． A ． says most food from cloning is expected to come not from clones themselves ， but from their sexually reproduced offspring ． It says clones are expected to be used mostly as breeding animals to spread good qualities ．
Public opinion studies show most Amerlcans do not 11ke the idea of food from cloned animals ． But this research also shows the public knows little about cloning ．
Cloning differs from genetic engineering ． A cell tak, from a so-called donor animal is grown into an embryo( 胚胎 )in the laboratory ． Next ， the embryo is placed into the uterus( 子宫 )of a female animal ． If the process is successful ， the pregnancy reaches full term and a genetic copy of the donor animal is born ．
67 ． From the passage ， we can conclude ．
A ． cloned adult animals are sate to eat
B ． foods from cloned animals are popular in America
C ． cloned animals will be easy to produce
D ． most foods from cloning is expected to come from clones themselves
68 ． The main purpose of the text is to ．
A ． tell a story B ． give a report
C ． glve advice D ． compare oPlnlons
69 ． Who believe that foods from cloning are safe to eat?
A ． Most Americans ． B ． An advisory committee ．
C ． Critics ． D ． The F ． D ． A ．
70 ． It can be inferred from the last paragraph that
A ． cloning has much in common with genetic
B ． not every cell taken from a donor animal can grow into a genetic copy
C ． the donor animal should be a female one
D ． cloned animals grow faster than normal ones
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