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 |
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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 |