Question

Considered an all-around inventor and often mentioned in the same sentence1.Thomas Edison,Eli Whitney is best known2.the invention of the cotton gin（轧棉机）in 1793 or 1794.Simply put,a cotton gin is a machine that 3.(use) to pull cotton fibers from the cotton seed（种子）.The cotton gin4.(be) a pioneering invention early in the southern United States,and it had5.great positive effect on the economies of the southern states in the US.The cotton gin also had an6.(equal) important effect on slavery in this country.Before Whitney's cotton gin,7.(raise) cotton required much labor and only a few8.(field) could favourably raise cotton.The cotton gin changed cotton into a widespread,money making and less labor-intensive（劳动密集型的）crop,leading to the rise of cotton9. (produce) in the Deep South.It is different to draw a conclusion with absolute certainty that the cotton gin directly 10.(lead) to an increase in slavery,but the cotton gin clearly was a major factor contributing to slavery issues in the South.

Answer

1.as

2.for

3.is used

4.was

5.a

6.equally

7.raising/to raise

8.fields

9.production

10.led

【解析】本文主要说了Eli Whitney发明的轧棉机给予了人们很大的帮助，并且对此进行了详细的说明。

1.本句意为想一些比较有名并且经常会被提到的发明家，紧接着后面举例了爱迪生，因为是一个名词，所以举例时应该用介词as

2.本句意为Eli Whitney是因为他轧棉机的发明而被众所周知的，be known for是固定搭配的词组，意为“由于…而出名”。故填for

3.本句意为轧棉机是用来从棉花种子中拉取棉花纤维的机器。That是用来指代前面的轧棉机的，后面是说轧棉机的用法，是“被使用于…”的意思，用be+done的形式，故填is used

4.本句意为轧棉机早期在美国南部地区是一个开拓性的发明。这里主语是轧棉机，宾语是开拓性的发明，后面的early可以得知是过去的事情。故填was

5.这里是说轧棉机有一个积极的优点。“great positive effect”是名词，前面需要定冠词。故填a

6.本句意为轧棉机有一个同样重要的原因。equal用来修饰后面的important，副词用来修饰形容词，故填equally

7.这里是说Whitney的轧棉机有什么样的作用，主语是轧棉机，从句表目的时可以用不定式或现在分词。故填raising/to raise

8.本句意为这里只有一些可以种棉花的土地。A few是“一些”的意思，后面可以加可数名词，故填fields

9.在这里是指带动了棉花产品的上升，因此要将produce变成名词形式。故填production

10.这里主要是指轧棉机在过去带来的一系列好处，是过去发生的事情，因此动词要用一般过去时。故填led