Read the passage carefully and fill the blanks with the appropriate word.

Once upon a time, long ago, there ___(1)____ a humble king and queen. Their subjects respected and loved their kind rulers. They could ___(2)____ to them with any problem they had. The king and queen ___(3)____ a good life but they were childless. They ___(4)____ to terms with not being able to __(5)_____ an ​heir but there was a constant sadness and emptiness in their hearts.