The professor has received the letter to give a lecture in frication Institute.A. being i

问题补充：

The professor has received the letter to give a lecture in frication Institute.

A. being invited

B. to be invited

C. inviting him

D. invited

答案：

A. being invited

B. to be invited

(答案→)C. inviting him

D. invited

解析：该题考查分词短语的用法。the letter与invite之间存在主谓关系，故要用现在分词作后置定语。