—Oh, really? I ____________. I _____________ go and visit him.
A:didn't know; am going to
B:hadn't known; would
C:haven't known; will
D:didn't know; will
– Can you hear a bus? – No. I can hear a ship.
北极地区因纽特人的传统民居是( )
函数y=x2-2x(-1≤x≤3)的值域是( )