- Is James at home?-- No he Yaan to be a volunteer.A. has gone to B. has been to C. is

问题补充：

- Is James at home?

-- No, he Yaan to be a volunteer.

A. has gone to B. has been to C. is going to

答案：

解析：句意：詹姆斯在家吗？——不，他已经去了雅安做志愿者。结合语境可知下文描述的是现在已经完成的动作，故用现在完成时态。选项B表示持续性动作，本句只强调动作的完成，故用瞬间动词，选A。