题例I：根据短文内容选择最佳答案
Jupiter's Moons and How They Travel
The many moons of Jupiter travel around the planet in different directions（方向）．
Jupiter is the largest planet in our solar system．Over the years，scientists have found that Jupiter has its own small solar system．Earth has one moon．Jupiter has at least sixteen and probably more．
Since there are so many moons，scientists began to number them．The numerals（numbers）tell the sequence，or order，in which the moons were found．They were slower to name the moons．All of Jupiter's moons now have a name as well as a number．
The first five moons to be discovered are known as the“inner moons”．But they are not the closest to the planet．The closest is only 127，600 kilometers away from Jupiter．All the inner moons circle the planet in counter-clockwise direction，that is，opposite of the hands of a clock．
Jupiter's middle group of moons are at least 11，100，000 kilometers from the planet．
They also move in a counter-clockwise motion（moving）．The four farthest moons are at least 20，700，000kilometers away．These are called“outer moons”．They circle in a clockwise motion．
How many more moons do you think will be discovered？
1．What does“solar system”in this article mean？
A．银河系B．宇宙空间C．流星雨D．太阳系
2．Things that travel in the same direction as the hands of a clock are said to be traveling in a ．
A．clockwise direction B．counter-clockwise direction
C．same direction D．different direction
3．Jupiter's group of moons travel in a clockwise direction．
A．planets B．inner C．middle D．outer
4．The numbers given to Jupiter's moons tell ．
A．the order in which they were discovered
B．the order in which they travel
C．the order of their distance from Jupiter
D．the order of names
5．According to the passage，which of the following statements is true？
A．None of Jupiter's moons have names．
B．Most of Jupiter's moons circle clockwise．
C．Jupiter's inner moons were discovered first．
D．Jupiter is the nearest planet to the earth．
6．How far away are the middle group of moons from Jupiter？
A．It's not mentioned．B．11，100，000 kilometers away．
C．127，600 kilometers away． D．20，700，000kilometers away．
答案与简析：
1．D。文中介绍木星（Jupiter）是最大的行星，地球只有一个月亮，而木星至少有16个甚至更多。木星同地球一样都是太阳系中的行星，由此可见，solar system就是指太阳系。
2．A。从．．．in counter-clockwise direction，that is，opposite of the hands of a clock．可以确定counter-clockwise direction意为“逆时针方向”，故可确定clockwise direction为“顺时针方向”。
3．D。由The four farthest moons．．．These are called“outer moons”．They circle in a clockwise motion．确定D为正确答案。
4．A。由The numerals（numbers）tell the sequence，or order，in which the moons were found．可知，此题应选A。
5．C。由木星的月亮以依次发现为序，由此可知the inner moons were discovered first。
6．B。由Jupiter's middle group of moons are at least 11，100，000 kilometers from the planet．可知。
