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
Giải bởi qa.haylamdo.com
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”.
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