【題目】 The planet Mars is the 【1】(close) and most similar planet to Earth. It is very interesting to scientists. For example, Mars has seasons with different weather, but other planets have 【2】 same temperatures all year round. Was there l【3】 on Mars?

T【4】 find out, scientists need to know if Mars ever had water. In 2004, two robot explorers(探測器), or ‘rovers’， called Spirit and Opportunity were sent to look for【5】(sign) of water. These rovers can drive over rocks 【6】 all kinds of rough ground. They can also use cameras and send photos back to Earth. 【7】(one), the two rovers found chemicals and patterns(圖紋) in the rocks that were probably 【8】(make) by water. Then, they moved to another area and found other rocks w【9】 may have been created by water. Now scientists think there was probably water on the planet long ago. Today they are still not sure if there was life on Mars. They 【10】(real) need more information to decide. The discoveries of the two rovers answered some old questions, but they also brought up many new ones.

【答案】

【1】closest

【2】the

【3】life

【4】To

【5】signs

【6】and

【7】First

【8】made

【9】which

【10】really

【解析】

本文是一篇說明文。主要介紹了對于火星上是否有生命的探索�？茖W(xué)家們的探索解決了一些老問題，也帶來了許多新問題。

19.句意：火星是接近地球最近并且是最相似的星球。根據(jù)空前的the和空后的most similar可知此處應(yīng)填最高級。故填closest。

20.句意：例如，火星有不同天氣的季節(jié)，但是其他星球整年有相同的溫度。same前面需加定冠詞。故填the。

21.句意：在火星上有________嗎？結(jié)合語境及首字母提示可知此處指火星上有生命嗎？且根據(jù)Was提示可知，此處應(yīng)填名詞單數(shù)，故填life。

22.句意：________找到答案，科學(xué)家們需要知道火星上是否曾經(jīng)有水。由語境可知，此處表示“為了”，結(jié)合首字母提示可知填To。

23.句意：在2004，兩個(gè)被稱為“精神”和“機(jī)會”的機(jī)器人探索器，或“漫游者”，被送往(火星為了去)尋找水的________。結(jié)合語境可知跡象不止一種，應(yīng)填名詞復(fù)數(shù)。故填signs。

24.句意：這些漫游者可以穿越巖石________各種崎嶇不平的地面。分析句子結(jié)構(gòu)可知此處缺少并列連詞來連接rocks和all kinds of rough ground，故填and。

25.句意：________，兩個(gè)探索器發(fā)現(xiàn)了巖石里的化學(xué)物質(zhì)和圖紋……。根據(jù)語境可知，此處指首先。故填First。注意句首單詞首字母需大寫。

26.句意：首先，兩個(gè)探測器發(fā)現(xiàn)石頭上可能由水造成的化學(xué)物質(zhì)還有圖紋。分析句子結(jié)構(gòu)可知此處為被動語態(tài)，應(yīng)填過去分詞。故填made。

27.句意：然后，他們移到另一個(gè)地區(qū)，發(fā)現(xiàn)其他可能由水造成的巖石。分析句子結(jié)構(gòu)可知該句為定語從句，先行詞為rocks，指代物，在定語從句中作主語，根據(jù)首字母提示可知填which。

28.句意：他們________需要更多的信息來決定。分析句子結(jié)構(gòu)可知此處缺少副詞修飾動詞need，故填really。

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