---How many ________ are there in your class? ---25. And there are 20 girls.

Look at the ______, sir. The white shirt is larger than the yellow one.

— How is the _______ in Tiandong?— It’s getting worse and worse. There are always long lines of cars on roads.

______ is very difficult.

 一Excuse me, where can I exchange _______?一There is a bank on the second floor.