. (2010·江西名校模拟) —I’ve heard they went skiing in the mountains last winter.                           

—It ______ true because there was so little snow there then. 

A．may not be

B．won’t be

C．couldn’t be

D．mustn’t be

车站为了接发车需要设线（）。

A、牵出

B、安全

C、到发

D、避难