改错练习

【改错练习】

What is a black hole? Well, it is difficult to answer the question,as the terms we would normally use to describe a scientific phenomenon __1

are adequate here. Astronomers and scientists think that a black hole is __2

a region of space which matter has fallen and from which nothing can __3

escape—not even light. But we can’t see a black hole. A black hole __4

exerts a strong gravitational pull and yet it has no matter. It is only space—or thus we think. How can this happen? __5

The theory is that some stars explode when their density increases to a particular point; they “collapse” and sometimes a supernova occurs.

The collapse of a star may produce a “White Dwarf” of a “neutronstar”—a star which matter is so dense that if continually shrinks by the force of __6

its own gravity. But if the star is very large, this process of shrinking may be so intense that a black hole results in. Imagine the earth reduced to the __7

size of a marble, but still having the same masses and a stronger __8

gravitational pull, and you have some ideas of the force of a black hole. __9

And no matter near the black hole is sucked in. __10

答案

【答案】

1 将as 改为since或者because

在表示原因的连接词中，只有as引导的原因状语从句不能位于主句之后，只能位于句首。

2 将adequate 改为inadequate,或者在are后加not

从逻辑上分析，因为我们拥有的科学术语“不充足”，所以才无法回答这个问题，所以用否定形式。

3 在which 前加into

这是一个定语从句，意思是“黑洞是太空中物质可以掉进去的地方”，所以定语从句应该为into which matter has fallen

4 将but 改为so

上文已提到“连光都无法从黑洞中逃出”，所以我们根本无法看到黑洞。这里应该是因果关系,而不是转折关系。

5 将thus改为so

这句话的意思是“那只是空间—或者我们认为它只是空间”。so做 think 的宾语，thus 只能做连词，不能做宾语。

6 将which 改为whose

这个定语从句的意思是“它是一颗星,其密度非常大，由于自身的引力,它在不断地收缩”。matter 属于star 所以关系代词应该用whose

7 去掉in

result为不及物动词,意为“形成了”，而result in sth. 意为“导致某结果”。

8 将masses 改为mass

mass 可指“大量的物质”，而the masses特指“劳动群众”，用在此处不妥。

9 将ideas 改为idea

idea在表达“印象”时，为不可数名词，不可以用复数。

10 将no改为any

分析便知，任何在黑洞附近的东西都会被吸进去。