Question

【题目】根据短文内容, 选择正确答案。
D
Have you ever heard someone use the phrase "once in a blue moon"? People use this expression to describe something that they do not do very often. For example, someone might say that he tries to avoid eating sweets because they are unhealthy, but will eat chocolate "once in a blue moon". Or someone who does not usually like to go to the beach might say "I visit the shore（海滨）once in a blue moon." While many people use this phrase, not everyone knows the meaning behind it.
The first thing to know is that the moon itself is never really blue. This is just an expression. In fact, the phrase "blue moon" has something to do with the shape of the moon, not the color.
As the moon travels around the earth, it appears to change shape. We associate (联系) certain names with certain shapes of the moon. For example, when we can see a small part of the moon, it is called a crescent moon (新月). A crescent is a shape that looks like the tip of a fingernail（指甲）. When we cannot see the moon at all, it is called a new moon. When we can see the whole moon, it is called a full moon. Usually, there is only one full moon every month. Sometimes, however, there will be two full moons in one month. When this happens, the second full moon is called a "blue moon".
Over the next 20 years, there will only be 15 blue moons. As you can see, a blue moon is a very rare event（稀罕事件）. This fact has led people to use the expression "once in a blue moon" to describe other very rare events in their lives.
（1）Which of the following would be a good example of using the phrase "once in a blue moon"?
A.Simon often tells jokes. Simon tells joke once in a blue moon.
B.Tom rarely remembers to do exercise. Tom does exercise once in a blue moon.
C.Mary likes to go shopping every weekend. Mary goes shopping once in a blue moon.
D.Cindy hates to stay up, but she stays up every day. Cindy stays up once in a blue moon.
（2）When does a blue moon happen in nature?
A.When the moon has a blue color.
B.When we cannot see the moon at all.
C.When there are two full moons in one month.
D.When we can only see a small part of the moon.
（3）Which of the following is another example of something that has a crescent shape?
A.The letter "O".
B.The letter "M".
C.The letter "H".
D.The letter "C".
（4）How often will a blue moon happen over the next twenty years?
A.Once a year.
B.Less than once a year.
C.More than once a year.
D.At least twice a year.
（5）What does the underlined part "This fact" in the last paragraph refer to?
A.A blue moon is a very rare event.
B.The moon appears to change shape.
C.The moon itself is never really blue.
D.A blue moon has something to do with the shape of the moon.

Answer 1

【答案】
（1）B
（2）C
（3）D
（4）B
（5）A
【解析】本文主要讲述了人们经常用once in a blue moon来表示“千载难逢”，并且说明了人们为什么用它来表示“千载难逢”的原因。
（1）细节理解判断题。根据文章，once in a blue moon是“千载难逢”“难得一遇”的意思。根据选项中四个句子的意思，只有B符合题意，故选B。
（2）细节理解题。根据文章中的“however there will be two full moons in one month. When this happens, the second full moon is called a blue moon（但是一个月内会有两个满月。当这种情况发生时，第二个满月被称为蓝色的月亮。）”，故选C。
（3）细节理解题。根据文章中的“A crescent is a shape that looks like the tip of a fingernail（指甲）”“ a small part of the moon”，故选D。
（4）细节理解题。根据Over the next 20 years, there will only be 15 blue moons可知，二十多年仅有十五次，一年多一次。故选C。
（5）细节理解题。根据 a blue moon is a very rare (稀有的)event，故选A。