英语阅读理解When wine was first made,wine makers found that it tur

英语阅读理解
When wine was first made,wine makers found that it turned sour(酸的) instead of staying sweet.They did not know what to do.At last they asked Louis Pasteur,(路易.巴斯德)a French scientist ,to find out why it turned sour.The scientists working with Louis Pasteur,said that there was something in the grape juice that made the wine sour.
But Louis Pasteur,did not think so.He tried many times and finally found out why.
He discovered that some microbes（微生物） and germs（细菌） that lived in the air had entered the wine and acted on it,so the wine turned sour.Louis Pasteur,also found that milk left in the open air for a few days because sour in the same way.
Louis Pasteur thought he could help the wine makers find a way to kill the microbes.He told them to make the wine hot enough and then get it cool quickly.In this way,the microbes would be killed.This way of producing the wine came to be known as pasteurization.(巴式消毒法)
Louis Pasteur,did the same thing with milk.The microbes and germs could not get into cause it to turn sour.
Many of the things we buy today are pasteurized.
1When wine was fist make,it___
A.got rotten B turned sour C stayed sweet D changed its colour
2 Louis Pasteur knew a lot about ____
A literature B medicine C chemistry and physics D history and geography
3 Louis Pasteur was asked to ___
A taste the wine B make another kind of wine C decide if the wine was drinkable D find out the reason why the wine didn＇t stay sweet
4 According to the scientists working with Pasteur ,____ made the wine sour.
A the air B the weather C the moisture D something in the grape juice
BCDD 书上答案是DCBD