–Whenhe? —In half an hour I think.A. has arrived B. did arrive C. will arrive

问题补充：

–Whenhe?

—In half an hour , I think.

A. has , arrived B. did , arrive C. will , arrive

答案：

解析：句意：他什么时候到？我想是半个小时后。arrive到达；根据In half an hour在半个小时后，可知为一般将来时，故选C.