It’s quite obvious that the aging population in China will cause heavy pressure on whole s

It’s quite obvious that the aging population in China will cause heavy pressure on whole society in the future.
A. /, the
B. the, /
C. a, the
D. a, a

(答案→)A. /, theB. the, /C. a, theD. a, a解析： 考查冠词用法。Pressure为抽象名词不可数，根据题意，非常明显中国的老龄人口将来会给整个社会造成沉重压力。前面压力为泛指，抽象名词不用冠词。后面特指整个社会，用定冠词。故选A。

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