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

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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
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 .---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
A

there be +v_ing有 ——正

D