某日下冰雹使得路滑而发生车祸，造成人员伤亡。此事件的风险因素是( )。
A．冰雹 B．路滑 C．车祸 D．人员伤亡
参考答案：A
When reading, you should ______ your attention on the main idea and the structure of the passage, not
on specific words or sentences. [ ]
A. pay
B. focus
C. put
D. expand
— Would you open the window , please ?
— Yes , I ____ .
A．will
B．would
C．do
D．can
