单选题
Lots of creatures already reproduce without sex. Since the birth of Louise Brown, the first test-tube baby, in 1978, {{U}}(1) {{/U}} of human beings {{U}}(2) {{/U}} in laboratory glassware rather than in bed.
If human cloning becomes possible—and since the birth of a sheep called Dolly, {{U}}(3) {{/U}} doubt that it will be feasible to clone a person by 2025—even the link between sex organs and reproduction {{U}}(4) {{/U}}. You will then be able to take a cutting from your body and grow a new person, {{U}}(5) {{/U}} you were a willow tree.
{{U}} (6) {{/U}}, we have already divorced sex from reproduction. In the 1960s, the contraceptive pill freed women to enjoy sex for its own sake. {{U}}(7) {{/U}}, greater tolerance of homosexuality signaled society's acceptance of nonreproductive sex of another sort. These changes are only continuations of a {{U}}(8) {{/U}} that started perhaps a million years ago.
Human beings {{U}}(9) {{/U}} the interest in infertile, social sex with a few other species: dolphins, apes and some birds. But {{U}}(10) {{/U}} sex is too good for human beings to {{U}}(11) {{/U}}, more and more people will abandon it as a {{U}}(12) {{/U}} of reproduction.
In the modern world, you can {{U}}(13) {{/U}} have sex and parenthood without suffering the bit {{U}}(14) {{/U}}. Some Hollywood actresses {{U}}(15) {{/U}} the urge for mothering by electing to adopt children {{U}}(16) {{/U}} spoil their figures (as they see it) by childbearing. For people as beautiful as this, the temptation to {{U}}(17) {{/U}} a clone (reared in a surrogate womb) could one day be {{U}}(18) {{/U}}.
However, human cloning and designer babies are probably not {{U}}(19) {{/U}}. Even assuming that the procedures are judged safe and efficient in farm animals, still a long way off, they will be heavily {{U}}(20) {{/U}}, if not banned, by many governments for human beings.
【正确答案】 A
【答案解析】hundreds of thousands of human beings数十万人。注意英语数词的表达。
【正确答案】 C
【答案解析】have been conceived in laboratory已经在实验室被创造出来。注意此处需要一个完成时态的被动语态。
【正确答案】 A
【答案解析】few doubt that没多少人会怀疑。注意few的否定含义。
【正确答案】 C
【答案解析】the link between…will be broken……之间的联系将被打断。注意此处要用将来时态的被动语态。
【正确答案】 C
【答案解析】as if you were a willow tree仿佛你是一棵柳树。注意此处要用虚拟语气来表达。
【正确答案】 C
【答案解析】In a sense在某种意义上来说。其余选项：D．In no sense决不； A．In case以防。
【正确答案】 D
【答案解析】At the same time与此同时。原文此处没有转折的意思，所以不能选择A．But，B．However和C．Whereas。
【正确答案】 A
【答案解析】a trend that started perhaps a million years ago或许一百万年前就开始了的一种趋势。其余选项都不合题意。
【正确答案】 C
【答案解析】share the interest in…with…与……共享……方面的兴趣。其余选项都与后面的介词with不搭配。
【正确答案】 D
【答案解析】even if即便是。此处为让步状语从句。
【正确答案】 B
【答案解析】too good for human beings to give up对人类来说太好了而不愿放弃。其余选项用在此处不合适：A．give out用完，用尽；C．give away赠送； D．give in屈服。
【正确答案】 B
【答案解析】as a means of reproduction作为生殖的手段。means n．方法，手段。看似复数，实为单数。
【正确答案】 A
【答案解析】you can even have sex你甚至可以享受性生活。even adv．甚至。其余选项没有这样的递进语气。
【正确答案】 D
【答案解析】without suffering the bit in between一点也不会经受两者中的任何痛苦。in between两者之间；两端之间。
【正确答案】 D
【答案解析】may have satisfied可能会满足。may have+PP表示对过去的猜测。选项A．be satisfied和B．have been satisfied对……感到满意，后面应当接介词with。
【正确答案】 A
【答案解析】rather than spoil their figures而不愿意损坏她们的体型。注意区别于other than：与……不同；除外。
【正确答案】 C
【答案解析】to adopt a clone收养一个克隆人。注意不要与adapt相混淆：adapt使……适应，改编。
【正确答案】 B
【答案解析】could one day be irresistible可能有朝一日会难以克制。
【正确答案】 D
【答案解析】probably not imminent或许还不会即将来临。根据后面的still a long way off离……还很遥远，可知D。imminent adj．即将来临的，逼近的。其他选项：A．coming来到；B．nearby在附近；C．realistic现实主义的，均不合题意。
【正确答案】 D
【答案解析】be heavily discouraged被强烈阻止。A．encouraging和C．encouraged意思与原文不相符，B．discouraging语态不对。