阅读下面短文，根据其内容完成后面各项任务。
    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（细胞）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所以我们了解得越多，医生就能做得越多。
    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）回答问题：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）将文中①处划线的英语句子译成汉语。

很长一段时间以来，人们一直试图了解人体。

很长一段时间以来，人们一直试图了解人体。

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

The genes.

The genes.

（4）从文中找出与下面所给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）将文中②处划线的汉语句子译成英语。

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.