【題目】Our classroom building has floors Our class is on the floor

A. three threeB. three thirdC. third; three

【答案】B

【解析】

句意:我們教學(xué)樓有三層,我們的教室在三樓。根據(jù)floors復(fù)數(shù),所以不能用third第三,用three,后接名詞復(fù)數(shù);根據(jù)floor單數(shù),所以不能用three,用third第三;故選:B

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