城市热岛效应出现的主要原因是 [ ]
A．纬度因素影响
B．地形因素影响
C．人类活动影响
D．海陆因素影响
答案：C
What’s the matter ________ you?
A．with
B．of
C．in
D．at
In recent years, millions of peasants flood into cities to _______. [ ]
A. earn their life
B. make their lives
C. earn their livings
D. make their living
