13.He made another wonderful discovery,_____ of great importance to science.( 。
A.which I think isB.which I think it is
C.which I think itD.I think which is

分析 他又做了一個奇妙的發(fā)現(xiàn),我認為這對科學很重要.

解答 A考查定語從句.本句是一個非限制性定語從句,先行詞是discovery,在定語從句中做主語,I think在定語從句中是插入語,所以用關系代詞which引導,故答案選A.

點評 定語從句又稱為形容詞性從句,綜觀歷年高考試題,我們可以發(fā)現(xiàn)該語法項目是測試中的熱點與難點,解定語從句的題目首先要知道哪一句是主句,哪一句是從句,被修飾的詞是誰,從句中的句子成分缺失什么,根據(jù)缺失成分的不同從而選出相對應的關系代詞或者關系副詞,從而選出正確的答案,解題的關鍵是從句句子的成分分析.

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