his

This isn't my bike; I think it's his.

(Chinese) 这不是我的自行车；我想是他的。

The blue jacket is mine, and the black one is his.

(Chinese) 蓝色夹克是我的，黑色的是他的。

His dog always waits for him at the bus stop.

(Chinese) 他的狗总是在公交车站等他。

His answer to the math problem was correct.

(Chinese) 他对那道数学题的答案是正确的。