As I understand, if scientists produced a human clone, there would be a great risk of it having a disease. Nobody seems to understand the ageing process of a clone. It would be terrible if a baby was the age of its parent at     31    . Its cells would grow old fast and it would die young.    32     until the technique is perfectly safe, it should be     33    .
I'd love to have a clone of     34    . I often wish I had a twin sister, someone who    35    me in everything. So why not a clone? Well, the idea    36    be fun but I'm not sure if it would be     37    . I think we would be playing with fire if we let scientists go ahead with     38    cloning. There are so many     39   
involved that all research in this area should be strictly controlled.
There are so many arguments     40     cloning that it is difficult to get anyone to consider the possible benefits. I am     41     that it is a technique which could be beneficial. The most obvious use would be for childless     42    . They would be able to have babies with their own genetic material. I don't see what's wrong with that.
Imagine a child     43     up knowing that his or her mother is really a sister or a brother. The emotional     44     on the child would be     45    . Or a child who was cloned from a dead brother or sister. What kind of emotional pressure would they feel, knowing they were made as a replacement for another? The whole idea
    46     me!
It's all very good to ban human cloning but scientists should be allowed to   47   
research. If they don't, we may     48     important benefits for our society, such as producing body organs. A clone is an     49     copy of a person with the same gene. Therefore, it is the     50     donor for an organ(器官) transplant.

A．home B．lab C．process D．birth

A．Besides B．Therefore C．Although D．Unless

A．banned B．allowed C．encouraged D．forced

A．itself B．herself C．myself D．yourself

A．overlooked B．contradicted C．accumulated D．resembled

A．may B．must C．can D．shall

A．messy B．safe C．swift D．awkward

A．human B．animal C．plant D．pet

A．obligations B．regulations C．formulas D．risks

A．against B．with C．for D．amid

A．vanished B．convinced C．violated D．teased

A．couples B．heroines C．dwarves D．elves

A．picking B．looking C．getting D．growing

A．pressure B．sample C．privilege D．ambition

A．unsinkable B．unimaginable C．unbearable D．unthinkable

A．scratches B．terrifies C．entices D．confronts

A．continue B．predict C．tear D．mention

A．chase B．contrast C．cure D．miss

A．handy B．identical C．contradictory D．transparent

A．ideal B．voluntary C．vacant D．inquisitive