15.听短文.选择最佳选项21.When was the computer invented?A.In the 21st century.B.In the 20th century.C.In the 19th century.22.How was the computer in the 1960's?A.Small and light.B.Heavy but cheap.C.Large and expensive.23.How many people u
解答答案:C 根据in 1885可知,这是表示过去的时间状语,所以运用一般过去时态;又因为主语it是动词invent的承受者,应该用被动语态.一般过去时态的被动语态的构成是:was/were+动词的过去分词,主语是单数it,所以用助动词用was,故选C. 点评判断动词的时态,此题主要注意时间状语去判断动词存在的状态;判断动词的语态,要看看...
10.Sometimes the greatest things are invented by mistake.The greatest mistake of all time could be those delicious snacks in your corner drugstore. One day,a woman was making chocolate cookies.When she ran out of chocolate powder(粉),she took out a chocolate bar and broke it into little pi...
When wasthe zipperinvented? 试题答案 在线课程 分析拉链是1987年发明的. 拉链什么时候发明的? 解答答案:When was,invented,划线部分指的是时间,提问用疑问词when,后加一般疑问句语序,将was提前,故答案是When was,invented. 点评要理解划线部分的含义,以及在句中的句子成分,判断出疑问词,疑问词后需跟一般疑问句语...
【题目】--___was the Zipper invented? --It was invented in 1893. A. What B. When C. How D. Who试题答案 在线课程 【答案】B 【解析】 试题分析:句意:拉链是什么时候被发明的?是在1893年被发明的。A. What什么;B. When何时;C. How怎样;D. Who谁。结合句意,故选B练习...
1. When chopsticks were invented? In fact, before the invention of chopsticks, Chinese ancestors actually used hands to eat, but how did they eat soup and porridge?1.Chinese started to use chopsticks about 3,000 years ago in Shang Dynasty. ...
When were chopsticks invented? In fact, before the invention of chopsticks, Chinese ancestors actually used hands to eat, but how did they eat soup and porridge? 【1】 Chinese Started to use chopsticks about 3,000 years ago in the Shang Dynasty. Who invented chopsticks? The records of using...
Nobody knows who invented the pencil or when it was invented. A Swiss described a pencil in a book in 1565. He said it was a piece of wood with lead(铅)inside it . Pencils weren’t popular, and people continued to write with pens. In 1795,someone started
Kites have been used for scientific purposes in the western world.In 1752,Benjamin Franklin tied a key to a kite and flew it in a storm to find out that lightening was a form of electricity.In the 1890s,Lawrence Hargrave invented the box kite to test ideas about flight.From 1898 until ...
4.Which of the following can best sum up the passage? A.The name Uncle Sam was invented during the War of 1821. B.There are many symbols of the United States,including Uncle Sam. C.Over time,the image of Uncle Sam came to represent the United States. D.Uncle Sam is a national symb...