人群健康水平的提高有利于
A．出生率提高B．平均期望寿命提高C．劳动力的工作时间延长D．人均摄人的热量增加E．儿童肥胖率提高
参考答案：C
—Where is your new home now?
—In the new developed zone. But I ______downtown for five years.[ ]
A. have lived
B. had lived
C. 1ived
D. was living
