Which of the following words fits gap 10?
Once upon a time, there was a prince who wanted to marry a princess, but she would have to be a real princess. He __(1)__ all over the world to find one, but nowhere could he get what he wanted. One evening during a terrible storm; there was thunder and lightning, and the rain poured down in torrents. Suddenly a knocking was __(2)__ at the palace door, and the old king went to open it. It was a princess standing out there. But, good gracious! What a sight the rain and the wind had made her look. The water ran down her hair and clothes; into the toes of her shoes and out again at the heels. And yet she insisted that she was a real princess. Well, we’ll soon __(3)__ out, thought the old queen. But she said nothing, went into the bedroom, took all the bedding off the bedstead, and __(4)__ a pea on the bottom; then she took twenty mattresses and laid them on the pea, and then twenty quilts on __(5)__ of the mattresses. On this, the princess had to lie all night. In the __(6)__ she was asked how she had slept. "Oh, very badly!" said she. "I scarcely closed my eyes all night. Heaven only knows what was in the bed, but I was lying on something hard, as a __(7)__ I am black and blue all over my body. It’s horrible!". Now they knew that she was a real princess because she had __(8)__ the pea right through the twenty mattresses and the twenty quilts. Nobody but a real princess could be as __(9)__ as that. So, the prince took her for his wife, for now he __(10)__ that he had a real princess.
Nobody but a real princess could be as sensitive as that. So, the prince took her for his wife, for now he knew that he had a real princess.