语法填空
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适当的词或使用括号中词语的正确形式（最多限填三个单词）填空。
Summer was coming and it was getting hotter. Mrs. King got____ early one morning and went to the market after she____（have）breakfast. She knew that everything was cheap there before eight o'clock. She wanted to buy many____ （vegetable）for her family. Suddenly she saw there were a ____ of people around a farmer. She hurried there and found that he was selling some beef.
“How____ does it cost?”a woman asked.
“Two dollars a kilo.”
“Oh，how cheap it is！" Mrs. King said to herself.“John____ （like）beef very much. I'd better buy some here．”
When she got____ with five kilos of beef，her son was happy but her husband got angry.
“What a silly woman！”said Mr. King.“How shall we keep it fresh in such hot weather?”
“Your aunt is very rich，”said Mrs. King.“Why not go and borrow some money____ her? Then we'll be able to buy a fridge．”Mr. King agreed and they began to teach their five-year-old son what____ （say）when they were at his aunt's house.
“John，”Mr. King said，“how can we keep the beef fresh?”
“That's easy，”the boy said____ （happy）.“By eating it！”
的定义域为R，
是