China has become the first country to land a spacecraft on the far side of the moon.The unmanned Chang'e4 probe(探测器)—the name was inspired by an ancient Chinese moon goddess—1.________(touch) down last week in the South PoleAitken basin.Landing on the moon's far side is 2.________(extreme) challenging.Because the moon's body blocks direct radio communication with a probe，China first had to put a satellite in orbit above the moon in a spot 3.________ it could send signals to the spacecraft and to Earth.The far side of the moon is of particular 4.________(interesting) to scientists because it has a lot of deep craters(环形山)，more so 5.________ the familiar near side.Chinese researchers hope to use the instruments onboard Chang'e4 6.________(find) and study areas of the South PoleAitken basin.“This really excites scientists，”Carle Pieters，a scientist at Brown University，says，“because it 7.________(mean) we have the chance to obtain information about how the moon 8.________(construct)．”Data about the moon's composition，such as how 9.________ ice and other treasures it contains，could help China decide whether 10.________(it) plans for a future lunar(月球的) base are practical.
【语篇解读】 本文是一篇说明文。介绍了中国是第一个登上月球背面的国家。
1．touched [考查时态。句中有时间状语last week，故用一般过去时。]
2．extremely [考查词性转换(形容词变副词)。副词extremely修饰后面的形容词challenging。]
3．where [考查定语从句的引导词。先行词是spot，后跟定语从句，关系词在从句中作地点状语，故用关系副词where。]
4．interest [考查词性转换(形容词变名词)。句中含有“be＋of＋名词”结构，be of particular interest＝be particularly interesting，故填名词interest。]
5．than [考查more...than...的用法。本句中含有more，空格后为比较对象，因此本空应填than。]
6．to find [考查非谓语动词(不定式)。句中的动词不定式短语to find and study areas of the South PoleAitken basin作状语，表目的。]
7．means [考查时态和主谓一致。根据上下文时态可知，本句也应用一般现在时，主语是it，故谓语动词用means。]
8．is constructed [考查时态和语态。此处表示“月球是如何构成的”，应用被动语态，且此处描述的是客观情况，故填is constructed。construct vt.建造，构建。]
9．much [考查how much的用法。how much“多少”，修饰不可数名词。]
10．its [考查代词。此处表示“它的计划”，故用形容词性物主代词its。]
