He wanted two cups of milk.对two cups of milk提问.是what还是what kind of drink.
问题描述：
He wanted two cups of milk.对two cups of milk提问.是what还是what kind of drink.
答
what kind of drink
答
What did he want ?
(two cups of milk全部已经提问了，就用what)
答
What did he want?
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答
What就可以了
答
What did he want?