对a present划线提问,为:What can you buy for Ben?
对I划线提问,为:Who can buy a present for Ben?
对a划线提问,为:How many presents can you buy for Ben?
对Ben划线提问,为:For whom can you buy a present?或 Who/Whom can you buy a present for?
估计是第一种可能性,
对a present划线提问,为:What can you buy for Ben?
对I划线提问,为:Who can buy a present for Ben?
对a划线提问,为:How many presents can you buy for Ben?
对Ben划线提问,为:For whom can you buy a present?或 Who/Whom can you buy a present for?
估计是第一种可能性,