单项选择题
A.easy B.easily C.serious D.seriously
I'm（）to graduate in the next half of the year.A.owingB....
单项选择题I'm（）to graduate in the next half of the year.
A.owing B.thanks C.due D.because
When I came through the customs at the airport, I had t...
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
Each year in the United States, many black teenagers（）o...
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.
A.go out B.drop out C.check out D.pull out
