With a huge amount of food ，all of the staff are busy preparing for the dinner tonight.
A. would serve
B. served
C. to serve
D. serving
网友回答
A. would serve
B. served
(答案→)C. to serve
D. serving
解析：考查with复合结构，句意：有大量的食物要准备，所有的职员在准备今晚的晚餐，可知大量的食物将要准备，用不定式做宾语补足语，选C。