We surely desire that the tour leader us immediately of any change in the travel schedules

问题补充：

We surely desire that the tour leader us immediately of any change in the travel schedules.

A. inform

B. informs

C. informed

D. has informed

答案：

(答案→)A. inform

B. informs

C. informed

D. has informed

解析：考查的动词的用法。desire 后所接的从句用虚拟语气that sb should do sth ，should 可以省略。