I often write__________ my brother, but he never hears__________ me.
A:from;to
B:to; of
C:to; to
D:to; from
—No, it isn't. book is on my desk.
①这列火车5小时可以行驶____千米?
②北京到济南有497千米,这列火车从北京出发,4小时后能到济南吗?____
—He's my____(brother/sister).