work to do/to be done

【问】“How about movies tonight?”“I'm sorry but I have too much homework____. ”

A. to be done B. done C. to do D. do(TOEFL，70，1)

为什么不能选(A)(to be done)?名词homework与do的关系不正是被动关系吗(或动宾关系吗)?

【答】 见infintive⁷。