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Almost every living cell holds a vast storehouse of information encoded in genes, parts of DNA that control__51__the cell replicates(复制)and functions and control the expression of__52__qualities. The__53__manipulation of one or more genes in order to modify an organism is called genetic engineering. The use of recombinant DNA in agriculture has allowed scientists to__54__ crops that possess__55__that they did not have__56__and that improve crop__57__or boost nutritional value. Such crops are__58__genetically modified organisms(GMOs). By manipulating plant genes, scientists have produced tomatoes with__59__shelf lives(保存期)and pest-resistant potatoes. “Golden rice” is a__60__of white rice__61__the gene for beta-carotene(β-胡萝卜素) has been added. This nutrient-dense rice was__62__for populations in developing countries where rice is a main product and where vitamin A__63__is widely prevalent(流行的) The__64__of producing genetically modified organisms is not__65__controversy. Some government agencies and ecologists, __66__numerous consumer groups,have__67__serious reservations about the__68__of such organisms and the products produced using them. While many of these objections are__69__,it is__70__that the use of genetic engineering in agriculture will be halted(停下).

问题1选项
A.when
B.how
C.what
D.why
问题2选项
A.inherited
B.inheriting
C.interested
D.interesting
问题3选项
A.acquired
B.academic
C.acceptable
D.artificial
问题4选项
A.discover
B.identify
C.create
D.invent
问题5选项
A.nutrition
B.vitamins
C.attributes
D.appearance
问题6选项
A.uneasily
B.easily
C.unnaturally
D.naturally
问题7选项
A.yield
B.quality
C.shape
D.color
问题8选项
A.said
B.talked
C.treated
D.termed59.
问题9选项
A.long
B.longer
C.short
D.shorter 60.
问题10选项
A.brand
B.term
C.commodity
D.variety61.
问题11选项
A.to which
B.of which
C.in that
D.by that 62.
问题12选项
A.developing
B.developed
C.controlling
D.controlled63.
问题13选项
A.absence
B.account
C.shortage
D.shortcoming64.
问题14选项
A.theory
B.company
C.idea
D.practice65.
问题15选项
A.with
B.without
C.inside
D.outside66.
问题16选项
A.as possible as
B.as soon as
C.as long as
D.as well as67.
问题17选项
A.told
B.spoken
C.voiced
D.argued68.
问题18选项
A.quality
B.quantity
C.value
D.safety69.
问题19选项
A.sensual
B.sensitive
C.sensible
D.sensory70.
问题20选项
A.unlikely
B.likely
C.willingly
D.unwillingly
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