题目内容：

从方框选择适当的词并用其正确形式填空。

usual  mistake rest  hundred  what  make  although  under  they  think  fly   how

Every morning, kids from a high school are working hard. They are __1.__ and selling special coffee at a coffee shop. They are also making a lot of money.

These students can make up to nine__2.__ dollars a day. They are selling their special coffee to airplane passengers. After the students get paid, the _3.__ of the money goes to a local youth project.

These high school students use a space in the Oakland airport. It is __4.___ very crowded. Many people who __5.__ on the planes like to drink the special coffee.

One customer__6.__that the coffee costs a lot but it is good and worth it. Most customers are pleasant but some are unhappy. __7._ do not like it if the coffee cafe is not open for business.

The students earn $ 6.10 an hour. They also get school credit while they learn _8.__ to run a business. Many of the students enjoy the work __9._ it took some time to learn how to do it.

They have to learn how to heat milk, load the pots, and add flavor. It takes some skill and sometimes __10.__ are made. The most common mistake is forgetting to add the coffee.