I with a big party the help of my former classmates in preparation of the advertising fir

问题补充：

I with a big party the help of my former classmates in preparation of the advertising firm.

A. exhibit

B. express

C. convey

D. acknowledge

答案：

A. exhibit

B. express

C. convey

(答案→)D. acknowledge

解析：acknowledge sth with sth 以……答谢某人所做的。express/convey thanks to sb。