閱讀下面短文，根據(jù)其內(nèi)容完成后面各項任務。
    DNA is the whole "map" of the human body.It is something that all humans have，and it tells the body what to do.DNA is the reason that we look like our parents，because we get some of their DNA to make our own.
    ①People have been trying to understand the human body for a long time.In 1860，Mr.Mendel discovered why we look similar to other people in our family.It is because of small things called "genes" in our body.In 1953，two scientists，Watson and Crick，found out that those small parts are real messages. They are written in the DNA with a special language.
    In 1961，another two scientists found the first "word" that they could understand in that language.It shows how DNA tells the cell（細胞）to build its parts.So far，scientists have found all the words in the DNA map，but we do not understand what they all do.By understanding what just one "word" means，we can help to save people from several illnesses. ②所以我們了解得越多，醫(yī)生就能做得越多。
    Most people hope that this will help to make better medicine to help sick people.Other people worry that when we learn more "words" and find out more information，we will use it in the wrong way，just to make people more attractive，or stop sick people getting jobs.

（1）回答問題：Why do we look like our parents？

Because we get some of their DNA to make our own.

Because we get some of their DNA to make our own.

（2）將文中①處劃線的英語句子譯成漢語。

很長一段時間以來，人們一直試圖了解人體。

很長一段時間以來，人們一直試圖了解人體。

（3）回答問題：What does the underlined word "They" refer to（指代）？

The genes.

The genes.

（4）從文中找出與下面所給句子意思相同的句子。
Although scientists have found all the words in the DNA map by now，but we do not understand what they all do.

So far，scientists have found all the words in the DNA map，but we do not understand what they all do.

So far，scientists have found all the words in the DNA map，but we do not understand what they all do.

（5）將文中②處劃線的漢語句子譯成英語。

So the more we understand，the more doctors will be able to do.

So the more we understand，the more doctors will be able to do.