4.that→which　考查非限制性定语从句。which作引导词且指代上文的a Yeti。

5.on→in　考查介词in的习惯搭配。in length "从长度上看"。

6.and→but　考查连词。上下文之间为转折关系,所以用but。

7.their→its　考查代词。根据前文的this creature,可知此处用its,表示"它的"。

8.mysterious→mystery　考查名词。由前面的the推知用名词形式。

9.去掉第一个the　考查习惯用法。such为指示代词,表示"如此的;这样的",不能与the连用。

10.it→one　考查代词。it指代上文提到的同一事物,one表示同类中的一个。

话题写作

　　用本单元所学词汇和句式结构翻译句子。

1.最近几年,有些人目睹了像UFO一类的东西。(witness)

2.事实上存在很多难以解释的、令人困惑的甚至令人惊奇的现象。(there exist;unexplained;puzzling;amazing)

3.人们相信有外部空间生物存在的可能性。(there is a possibility of )

4.我们希望专家可以对此事进行调查。(look into)

【联句成篇】　把以上句子联成短文,要求衔接连贯、过渡自然。

答案

1.In recent years, some people have witnessed something similar to UFO.

2.In fact, there exist many unexplained, puzzling and even amazing phenomena.

3.People are convinced that there is a possibility of the existence of outer space creatures.

4.We hope experts can look into it.

【参考范文】

In recent years, some people have witnessed something similar to UFO. In fact, there exist many unexplained, puzzling and even amazing phenomena. People are convinced that there is a possibility of the existence of outer space creatures. Therefore, we hope experts can look into it.