19.There is no doubt ________ the earth is becoming warmer and that it is human activity ________ has caused this global warming rather than a random but natural phenomenon.( 。
A.whether; whetherB.whether; that
C.that; thatD.that,whether

分析 毫無(wú)疑問(wèn)全球正在變暖這是人類(lèi)的活動(dòng)造成的全球變暖而不是一個(gè)自然的現(xiàn)象.

解答 C 考查名詞性從句和強(qiáng)調(diào)句.分析提干可知第一個(gè)從句the earth is becoming warmer 是一個(gè)同位語(yǔ)從句,是對(duì)于doubt的解釋?zhuān)鶕?jù)句意"毫無(wú)疑問(wèn)地球正在變暖",所以答案用that;第二個(gè)句子是強(qiáng)調(diào)句,被強(qiáng)調(diào)部分是human activity,根據(jù)強(qiáng)調(diào)句的固定結(jié)構(gòu)It is/was+被強(qiáng)調(diào)部分+that+句子的剩余部分.所以答案是that.故答案選C.

點(diǎn)評(píng) 本題是一個(gè)復(fù)雜句,解題的關(guān)鍵是分析句子的在句中充當(dāng)?shù)某煞趾途湫停缓蟾鶕?jù)不同的句型逐一進(jìn)行解答.

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