The aging population _____ each day .There must be some kind of interesting activity for the old.
A．has grownB．grewC．will growD．is growing
D

試題分析：句意：老齡化人口每天都在增長(zhǎng)。必須有某種有趣的老年人的活動(dòng)。因?yàn)槭乾F(xiàn)階段正在發(fā)生的事情，用現(xiàn)在進(jìn)行時(shí)，所以選D。
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