water boils ( boil ) at the 100 degrees centigrade
(-) water doesn't boil at the 100 degrees centigrade
(?)Does water boil at the 100 degrees centigrade
water ___boils___( boil ) at the 100 degrees centigrade
(+) water boils at the 100 degrees centigrade
(-) water doesn't boil at the 100 degrees centigrade
(?) Does water boil at the 100 degrees centigrade
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