（1）To keep down the cost of extra staff，Nancy and Ella do a lot of work

.
（2）Nancy and Ella work well together and each of them has her

.
（3）Nancy is

，so she does the book-keeping in the hotel.
（4）Ella is smart and patient.She tries her best to help the guests

.
（5）Nancy and Ella provide

for college students to earn pocket money.