【題目】___________of the earth ________covered with water.

A. Seventh-tens; areB. Seventh-tens; is

C. Seven-tenths; isD. Seven-tenths; are

【答案】C

【解析】

句意:地球的十分之七被水所覆蓋。

這里是分?jǐn)?shù)的表達(dá)法,分子用基數(shù)詞,分母用序數(shù)詞,當(dāng)分子超過一,分母變復(fù)數(shù)。排除AB,主語是the earth ,這里是單數(shù),be動詞用is。根據(jù)題意,故選C。

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