Tháng Tư 2, 2026

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

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
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Đáp án: B thành “twenty-dollar bill”
Giải thích: Trong câu này thì “twenty-dollar” là tính từ bổ nghĩa cho “bill” nên không thêm “s”.