She only had a twenty-dollars bill with her when she landed at Healthrow airport. A. had B. twenty-dollars bill C. when D. at

Chọn đáp án B. twenty-dollars bill => twenty-dollar billTrong câu này thì “twenty-dollar” là tính từ bổ nghĩa cho “bill” nên không thêm “s

She only had a twenty-dollars bill with her when she landed at Healthrow airport.