题目内容：

Willian Henry is a young American professor who__(teach)in a chinese college for there years.

优质解答

这里需要用到现在完成进行时：have been teaching现在完成进行时：（一）表示从过去某时开始一直持续到现在的动作,并且还将持续下去.（正是题目中的情况）I have been learning English since ten years ago.自从十...