【題目】閱讀下面短文，在空白處填入1個適當?shù)膯卧~或括號內(nèi)單詞的正確形式。

Today we know Antarctica as an extreme environment 【1】 (contain ) ice and snow. But new research provides evidence that the area was very different in the past, 【2】 was found inside a piece of Earth sediment (沉淀物) gathered by researchers 【3】 under the seafloor off the coast of Antarctica.

In the sediment, they 【4】 (find) forest soil estimated to be about 90 million years old and this would have been in the Cretaceous Period, when dinosaurs were the main land 【5】 (animal). Johann Klages, who was the lead writer of a study on the findings 【6】 (publish) in the journal Nature, said the sediment collection was from 【7】 depth of about 30 meters below the ocean floor. Klages said an examination showed that the material formed on land, not in the ocean.

The Earth has experienced in the past and is 【8】 (current ) undergoing today. The researchers said that the rainforest environment in Antarctica was especially surprising, because each year the area 【9】 (experience) a four-month polar night when there is no sunlight to fuel plant life. Klages said no ice sheets were present during the time, but 【10】 (season) snowfall was likely.

【答案】

【1】containing

【2】which

【3】from

【4】found

【5】animals

【6】published

【7】a

【8】currently

【9】experiences

【10】seasonal

【解析】

本文是說明文。研究人員從南極洲海岸附近的海底收集的一塊泥土沉積物中發(fā)現(xiàn)：這些沉積物是在陸地上形成的，而不是在海洋中。

【1】

考查非謂語動詞。分析句子結(jié)構(gòu)可知，句中已有謂語動詞，此處用非謂語。主語Antarctica和動詞contain是主動關(guān)系，用現(xiàn)在分詞形式作定語，故填containing。

【2】

考查定語從句。句中包含非限制性定語從句，先行詞是evidence，在定語從句中做主語，只能用關(guān)系代詞which引導(dǎo)，故填which。

【3】

考查介詞。句意：但新的研究提供了證據(jù)，證明這片區(qū)域與過去大不相同，它是在研究人員從南極洲海岸附近的海底收集的一塊泥土沉積物中發(fā)現(xiàn)的。表示“從，來自”，故填from。

【4】

考查動詞時態(tài)。此處講述通過研究泥土沉積物的發(fā)現(xiàn)，是過去發(fā)生的事。與上下文時態(tài)一致，用一般過去時。故填found。

【5】

考查名詞復(fù)數(shù)。animal是單數(shù)可數(shù)名詞，與主語和系動詞dinosaurs were一致用復(fù)數(shù)，故填animals。

【6】

考查過去分詞。句中findings和動詞publish是被動關(guān)系應(yīng)該用過去分詞，指這些發(fā)現(xiàn)被出版，故填published。

【7】

考查冠詞。此處指收集的沉積物來自海床下大約30米的深度，a depth of“……的深度”，故填a。

【8】

考查副詞。修飾動詞undergoing用副詞，故填currently。

【9】

考查動詞時態(tài)和主謂一致。根據(jù)句中時間狀語each year可知用一般現(xiàn)在時，主語the area表示單數(shù)意義，謂語動詞與之一致用第三人稱單數(shù)，故填experiences。

【10】

考查形容詞。此處表示季節(jié)性降雪，修飾名詞snowfall用形容詞，故填seasonal。

分析定語從句關(guān)鍵抓住兩點：第一、找準先行詞；第二、看先行詞在定語從句中所作的成分。先行詞往往為名詞或代詞，如小題2中包含非限制性定語從句，先行詞是evidence，在定語從句中做主語，只能用關(guān)系代詞which引導(dǎo)。

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