语法填空
Once there was a cowboy, Niulang,____lived with his elder brother and sister-in-law. But she disliked and abused him, and the boy was forced ____ (leave) home with only an old cow for company.
The cow, however, was a former god who had broken royal rules and ____ (send) to earth in bovine（牛的）form.
One day the cow led Niulang____a lake where fairies took a bath on earth. Among them was Zhinu____most beautiful fairy and a skilled woman tailor.
The two fell in love at first sight and were soon married. They had a son and a daughter and their happy life was held up as an example for hundreds of ____ (year) in China. Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was____(strict) forbidden. He ordered the heaven troop to catch Zhinu back.
Niulang grew desperate when he discovered Zhinu had been taken back to heaven____ (drive) by Niulang's misery, the cow told him to turn its hide into a pair of shoes after it died. The magic shoes whisked（匆匆带走）Niulang,____ (carry) his two children in baskets strung from a shoulder pole, off on a chase after the empress. Even the Jade Emperor was touched, and allowed Niulang and Zhinu to meet once a year on the____ (seven) night of the seventh month.
时，不等式
恒成立，则实数
的取值范围是（ ）