朵雅防辐射服排第几:英语题~~

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(1)填空:I must do my homework,I can't go hiking and I can't play e____.
(2)他们多大了?Bill,George,Sally and Ann are brothers and sisters.I don't know how old each of them. I only know one of them is eighteen, one is fifteen, one of the boys is sixteen and one of the girls is seventeen. I also know thay Bill is older than Sally but Ann isn't.
Ann is____years old. Bill is _____ years old.
George is ____years old. Sally is _____years old.
谢谢啦!!!!

1.either
2.15;18;16;17