问题
选择题
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
答案
答案：A
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。