He ______ his father for a new bicycle on his twelfth birthday.

问题描述:

He ______ his father for a new bicycle on his twelfth birthday.
demandedB. required C. requested D. asked答案是D,其他3个为什么不行

ask ...for...向某人要求某物,或者说“请求某人做某事”其他三个语气比较强硬.