3．Which of the following is NOT true according to the passage?

A．Dolly the sheep was cloned by using SCNT.

B．Identical twins are naturally created human clones.

C．A clone，if created，would magically appear at the same age as the original.

D．Twins are genetically the same，but they don't really look and act exactly alike.

C　解析：细节理解题。根据倒数第四段第一、二句话"A common misconception is that a clone，if created，would magically appear at the same age as the original.This simply isn't true."及之后的论述可知。

4．According to the passage，we cannot have a clone to do our homework now because ________．

A．the technology is not so advanced

B．there are many cloning experiments that failed

C．problems may arise later

D．all of the above

D　解析：细节理解题。综合全文，尤其是倒数第二段可知，A、B、C三项都是现在还不能克隆人的原因。

完形填空

　　Recently I have been reminded of the very unexpected generosity and kindness I once experienced on a hitchhiking (搭便车) trip.

　　In 1981, I decided to __1__ my girlfriend, who lived in Napier, and __2__ I was short of money, hitchhiking was the only way to go. __3__ Auckland early in the morning, carrying only a small backpack, I set off by bus to the entrance of the Southern Motorway. I soon got __4__. Most were short, but nevertheless I was on my way. I enjoyed the __5__ conversation and was lucky enough to have made some __6__ by dusk.

　　As I walked along a tree­lined country road, I __7__ where I would spend the night. It was summer and the weather was __8__ so I thought I could sleep under a tree. An elderly gentleman greeted me and asked me where I was __9__， interrupting(打断) my thoughts. I __10__ that I was hoping to get to the next town, "Opotiki."

　　"You won't get there before dark，" he said. "So come with me and we'll put you up for the __11__．"

　　Opotiki was a further 25 km away, so I __12__ him to a comfortable, warm house nearby. He introduced me to his wife who was __13__ dinner. They invited me to sit at the __14__ and before long I was enjoying a nice cup of tea followed by a __15__ dinner.

　　After dinner I was shown to my __16__： an old bus that was parked in the back garden. It had a double bed in it and I had a very __17__ night's sleep.

In the morning I woke to a cup of tea and a nice hot breakfast. I began saying goodbye and