The population of this city, 30% of which , 10% in the last two years.
A. are Chinese; has risen by
B. are China; has fallen by
C. is Chinese ; have increased
D. is China; have reduced by
网友回答
(答案→)A. are Chinese; has risen by
B. are China; has fallen by
C. is Chinese ; have increased
D. is China; have reduced by
解析：population人口作主语时谓语动词用第三人称单数，但是当population与分数、百分数连用做主语时谓语动词用复数，因此本题选A。