A:One half; are
B:Two seventh; i
C:A quarter; i
D:Two thirds; are
世界上最高的大高原是( )
总朝一个方向走, 最后能回到原地的是 ( )
My dog often ______ at my feet, but this morning it ______ beside the fireplace.
下列命题中是真命题的是( )