Question

Does ________ play computer games?

1. A.
   he
2. B.
   him
3. C.
   his
4. D.
   they

Answer 1

A
助动词Does暗示该句主语应为第三人称单数的人称代词，首先排除D项；him为宾格，his为形容词性物主代词，均不能作主语。故选A项。