How often he in summer? A does; swim B is; swimming C does; swims D do; swims

问题补充：

How often he in summer?

A does; swim B is; swimming C does; swims D do; swims

答案：

解析：此题重点考查特殊疑问句的基本构成。特殊疑问词+助动词+主语+动词原形？