阅读下面短文，在空白处填入一个适合的单词或填入括号中所给单词的正确形式。
Every morning, kids from a high school are working hard. They are {#blank#}1{#/blank#}(make) and selling special coffee at a coffee shop. They are also making a lot of money.
These students can make up to nine {#blank#}2{#/blank#}(hundred) dollars a day. They are selling their special coffee to airplane passengers. After the students get paid, the rest {#blank#}3{#/blank#} the money goes to a local youth project.
These high school students use a space in the Oakland Airport. It is {#blank#}4{#/blank#} (usual) very crowded. Many people who fly on the planes like to drink the special coffee.
One customer(顾客) thinks that the coffee costs a lot {#blank#}5{#/blank#} it is good and worth it. Most customers are pleasant but some {#blank#}6{#/blank#} (be) unhappy. They do not like it if the coffee shop is not open for business.
The students make$6. 10 an hour. They also get school credit(学分)while they learn how {#blank#}7{#/blank#}(run)a business. Many of the students enjoy the work although {#blank#}8{#/blank#} took some time to learn how to do it.
They have to {#blank#}9{#/blank#} (learn) how to heat milk, load the pots, and add flavor. It takes some skills and Sometimes{#blank#}10{#/blank#} (mistake) are made. The most common mistake is forgetting to add the coffee.
