单项选择题
When I came through the customs at the airport, I had to pay（）on a clock I had bought.
A.taxes B.duty C.fines D.fees
单项选择题 Each year in the United States, many black teenagers（）of school, either because they cannot keep up or they have to work to support their family.
单项选择题 Attendance at football matches have（）since the coming of television.
单项选择题 The engine has broken and the boat is（）on the water.
