【題目】There are ________ students in our class, twelve boys and eighteen girls.

A.thirtiethB.thirtyC.thirteenD.thirties

【答案】B

【解析】

句意:我們班有三十個(gè)學(xué)生,十二個(gè)男孩十八個(gè)女孩。

考查數(shù)詞。thirtieth第三十;序數(shù)詞;thirty三十;基數(shù)詞;thirteen十三,基數(shù)詞; thirties復(fù)數(shù)。此處是there be句型,根據(jù)“twelve boys and eighteen girls.”這里是“有三十個(gè)學(xué)生”,故選B。

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