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f50．Accordi
gtothepassage
iso
eofthegarde
i
gactivities
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gTV
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gflowers
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gdogs
D．playi
gwithpho
es
51．Whichofthefollowi
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bethemissi
gparti
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i
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i
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C．Garde
i
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D．Garde
i
gca
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eighbors
52．Thebesttitleofthepassagemaybe“A．OutdoorActivitiesC．HealthyEati
gHabits
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tagesofGarde
i
gD．Relatio
shipswithNeighbors
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tistsi
Britai
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dtheU
itedStateshavemadea
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zyme酵素thateatsplastics塑料Withitshelpplasticsca
betur
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tosmallerpartsa
dgoawayquicklyScie
t
istsbelievethati
thefutureitcouldsolvetheproblemofplasticpollutio

Thee
zymeisabletobreakdow
PETaformofplasticPETwasfirstmadei
the1940sa

dis
owwidelyusedtomakeplasticbottlesItca
remai
i
thee
viro
me
tforma
yyearsa
d
pollutelargeareasofla
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dotherplasticsTheresearchersmadethediscovery发现whileexami
i
gthestructureofa
aturale
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i
Japa
Theyfou
dthatthe
aturale
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oacids氨基酸Itmadethe
a
turale
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gabilitiesworkfastera
dbetter
Joh
McGeeha
o
eoftheleadresearcherssaid“We’vemadea
improvede
zymeIt’sbe
ttertha
the
aturlo
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dwearetryi
gtomakemoreimproveme
tstoit”Hewe
to
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otharmfultohuma
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dlytothee
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me
tSoweareco
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i
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towideruse”Theteamis
owtryi
gtomakethee
zymebreakdow
PETi
largequa
tities大量的
“We’llseethattheplasticpollutio
maybestoppedwiththistech
ologyHoweverthereisstill
alo
gwaytogo”Joh
McGeeha
added
f53．Accordi
gtothescie
tiststhee
zymemaysolvethepoblemof
A．air
B．water
C．light
D．plastic
54．Theu
derli
edphrase“breakdow
”i
thepassageprobablymea
s“
A．实验
B．生产
C．发明
D．分解
55．Researchersdiscoveredthata
aturale
zymehelpedeatplastics
A．i

B．i
theUS
C．i
Japa

D．i
Chi
a
56．Whichofthefollowi
gisTRUEaccordi
gtothepassage
A．Thescie
tistsaresilltryi
gtoimprovethee
zyme
pollutio
”i
Chi
ese

B．Thee
zymewillpollutelargeareasofla
da
dwaterC．The
aturale
zymewoksbettertha
theimprovedo
eD．The
aturale
zymeisharmfultohuma
sa
da
imals
D
Acupofcoffeeisagoodwayforma
ypeopletostarttheirdayItca
alsopasso
ki
d
essMa
r