They'd both grown up in a rural ( ) area and disliked urban life.
A. 乡村的
B. 城市的
C. 贫穷的
D. 富裕的
There were also photovoltaic ( ) tiles fixed to the top and bottom of this sloping wall.
A. 机械的
B. 光电池的
C. 风能的
D. 太阳能的
These are tiles ( ) that are designed to store energy from the sun.
A. 瓦片
B. 装置
C. 屋顶
D. 技术
Light is utilized ( ) as fully as possible.
A. 利用
B. 循环
C. 照射
D. 分散