The world’s elderly population will exceed(超过) of children by 2060, when each group to account for about one fifth of the population.
A. that ; is expected
B. it; will expect
C. that; expects
D. one ; will be expected
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(答案→)A. that ; is expected
B. it; will expect
C. that; expects
D. one ; will be expected
解析：句意：到2060年为止是，世界老年人口的数量将超过孩子们人口的数量，到那时，分别占到了整个人口的五分之一。that指代the population, be expected to 有望…,不定式形式表将来。