短文填词（10分）
One day, a 10-year-old entered a coffee shop．After he
sat a table, he asked a waitress．"How much is an 76．__ _
ice cream sundae?" "50￠"r____the waitress．The little 77．__ _
boy pulled his hand out of his pocket and c_____the coins 78．__ _
in it．“Well, how ___ a plain dish of ice cream? he asked． 79．__ _
By now more people were w____for a table and the waitress 80．__ _
sas growing______（不耐烦）"35 ￠!" she answered unhappily． 81．__ _
"OK, I’ll have the plain ice cream," he asked．The boy f the 82．__ _
ice cream paid the ____ （账单） and left．However, when the 83．__ _
waitress wiped down the table, she found that beside the___（空白） 84．__ _
dish there were two nickels and five pennies．You see, he couldn't
have the sundae ____he had to have enough left to leave her a tip． 85．__ _
