---Did you hear that water in Tai Lake s

单词分类；请根据所给句子的意思，从下面的方框中选出可以填入句子中的单词，并将其字母标号填在答题卷相应的位置。

小题1:Do you know that scientists have           /           water on Mars?

小题2:We all like the music because it is very         /        .

小题3:He is a clever boy and he can play the         /          very well.

小题4:Tony’s father is a famous          /         .

小题5:You should smile when you like           or          .

自然界中有一种含有叶绿体的原生动物——眼虫，这说明植物的细胞器同样可以在某些动物细胞中存活。某同学提出问题“动物细胞与植物细胞之间可以实现杂交吗？”他设计出了下列实验方案。结合实验方案回答下列问题：实验原理：根据眼虫的特点，动物细胞和植物细胞之间在理论上是可以实现杂交的。实验步骤如下：

(1)①中选的植物材料细胞中，必须有的细胞器是________________。

(2)③过程所用的酶是______________。

(3)④过程除了用电刺激之外，还可以用______________等作诱导因素。

(4)⑤过程动物细胞体外培养需要满足的条件是______________。

(5)在整个实验过程中，要强调所用的器械的灭菌和实验人员的无菌操作，原因是__________。

(6)在⑤⑥过程中，通常要添加血清，原因是___________________________________。

(7)如果让动植物杂交种批量培养生产，可以用_________________技术。

(8)动植物杂交种细胞是否有细胞壁？为什么？_______________________________。

材料：
我国公共机构能源消耗巨大，公共机构每年能耗等于全国8亿农民能耗之和，人均耗电量是城镇居民的19倍。2008年8月1日，温 * * * * 签署第531号国务院令，公告自2008年10月1日起正式实施《公共机构节能条例》。此前，胡 * * * * 于2007年10月28日签署第77号 * * 令，公告自2008年4月1日起施行修订后的《中华人民共和国节约能源法》。在《节约能源法》里面的第三章第五节专门讲了公共机构节能的问题。
要求：
根据以上材料，自拟题目，写一篇文章，谈谈你的看法与感想。篇幅不少于600字。

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

While some military planners claimed that it would be possible to win a war fought with nuclear weapons, many scientists argued that such a war could not truly be won, because the fallout from nuclear warfare would create a nuclear winter and it also would be rendering the earth uninhabitable.（）

A. it also would be rendering the earth uninhabitable

B. rendering the earth uninhabitable

C. might have uninhabitably rendered the earth

D. render the earth uninhabitable

E. would also have rendered the earth uninhabitable

I simply couldn't understand how it _____ that you did so much work within such a short time.[ ]

A. came about

B. came back

C. came up

D. came along