I am too glad you.A. to seeB. seeingC. sawD. at seeing

问题补充：

I am too glad you.

A. to see

B. seeing

C. saw

D. at seeing

答案：

(答案→)A. to see

B. seeing

C. saw

D. at seeing

解析：too后面加表示感情的词，意思相当于very。