1．On February 29，Billy Smith will celebrate his 15th birthday．He will be 60years old．
How is this possible？Billy was born on February 29，or"Leap Day"Leap day only happens on"leap year"，which come once every four years．So Billy has been alive since 1952，he has only had 14birthdays．
What is Leap Day？It is a way of making our calendar more accurate，in most years，F(xiàn)ebruary has 28days，and the whole year has 365．The problem is that the earth takes a little more than 365days to go around the sun-about six hours more，or one fourth of one day．So to make up for this difference，every four years an extra day is added to February：February 29．Billy's birthday．
So what is it like being born on Leap Day？"I‘ve always liked having my birthday on the 29th，"says Billy．"It's always been very special．"But doesn't he mind only having his birthday once every four years？"Not at all，"he says．I like to think it helps keeping me young．

41．Billy Smith has celebratedB birthdays
A．15　　　B．　14　　　C．　60　　　D．29
42．which one is NOT TRUE according to the text？A
A．The earth takes 365days to go around the sun．
B．The earth take 365days and six hours to go around the sun．
C．The earth takes 365days and one fourth of a day to go around the sun．
D．The earth takes 365.25days to go around the sun．
43．How often can Billy Smith have his birthday（February 29）？B
A．Every fifteen years         B．Every four years
C．Every year                D．Every other year
44．Which year is the"Leap year"in the following？D
A.2013      B.2014      C.2015      D.2016
45．Why doesn't Billy mind his birthday on February 29？C
A．Because he likes his birthday
B．Because he has no choice．
C．Because he likes to think it helps keep him young．
D．Because it can make him young forever．

分析 本文講述了Billy Smith 出生在閏日，他每四年才能過(guò)一次生日，但是他一點(diǎn)兒也不在意過(guò)生日這件事情，因?yàn)樗J(rèn)為不過(guò)生日能讓他覺(jué)得自己保持年輕．

解答 41．B  細(xì)節(jié)理解題  根據(jù)"So Billy has been alive since 1952，he has only had 14 birthdays．"可知，他已經(jīng)過(guò)了14個(gè)生日，故答案為B
42．A  細(xì)節(jié)理解題  根據(jù)"The problem is that the earth takes a little more than 365days to go around the sun-about six hours more，or one fourth of one day"可知，地球繞太陽(yáng)一周需要365天零大約六小時(shí)或者四分之一天，故A選項(xiàng)錯(cuò)誤，答案為A
43．B  推理判斷題  根據(jù)"So to make up for this difference，every four years an extra day is added to February：February 29．"可知，每四年二月才會(huì)多出來(lái)一個(gè)閏日，所以他只能四年過(guò)一次生日，答案為B
44．D  推理判斷題  根據(jù)"So to make up for this difference，every four years an extra day is added to February"可知，閏年的年份應(yīng)該是4的倍數(shù)，選項(xiàng)中只有2016是4的倍數(shù)，故答案為D
45．C  細(xì)節(jié)理解題  根據(jù)"I like to think it helps keeping me young"可知，他一點(diǎn)兒也不在意過(guò)生日這件事情，是因?yàn)樗J(rèn)為不過(guò)生日能讓他覺(jué)得自己保持年輕．故答案為C

點(diǎn)評(píng) 做這道題時(shí)要先通讀全文，弄清短文大意，然后根據(jù)相關(guān)句子選出正確答案，最后仔細(xì)檢查．

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