问题描述：
why do you look so upset?there are so many problems___a.remaining to be settled b.remaining to .
---Why do you look so upset?___There are so many problems_______. a.remaining to be settled b.remaining to settle c.remained settling d.remained to be settled
---Why do you look so upset?___There are so many problems_______. a.remaining to be settled b.remaining to settle c.remained settling d.remained to be settled
问题解答：
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