2017
年12月英语四级阅读模拟练习题及答案
　　task
1　　Thefuture
population
will
beolder
than
today,
andthis
inturn
will
change
thepatterns
ofsocial
demands.
However,
Mexico
will
still
befarfrom
theaging
societies
that
will
most
likely
prevail
(占优势)intheindustrialized
countries.
Inless
than
25years,
thecountry
will
have
toaddalmost
asmuch
infrastructure
asithasalready
built
uptonow,
simply
tomaintain
services
andproduction
atthecurrent
levels.
This
will
beatremendous
challenge,
although
asimilar
onewasfaced
success ...