完形填空． 先通读下面的短文，掌握其大意，然后从下面四个答案中选择可以填入相应空白处的最佳答案。（本大题共5分，每小题0.5分） Mr. Greena small town. He can’t speak very. He stammers (口吃) a lot when he .One day he goes to a shop. He wants to buy a parrot(鹦鹉). He the shopkeeper(店主), “D-do-do you have a p-parrot?” “Yes, sir.” answers the shopkeeper. “a nice green. It knows everything.” So Mr. Green buys and goeswith his bird. But a few days, he it back to the shopkeeper. “This bird can’t t-t-talk. It can only st-t-ammer.”