Question

【题目】阅读下面材料，在空白处填人适当的内容（1个单词）或括号内单词的正确形式。将答案填写在答题卡的相应位置。

The History of Air Conditioners

The first practical cooling system for use in industry 【1】 (invent) in 1902 by Willis Carrier in New York, the USA. He continued to improve 【2】 （he) invention and, in 1928, developed the first air conditioner for home use. In 1939, an American car company introduced the first air conditioner for cars, 【3】 (make) driving more comfortable.

After World War II many American 【4】 (company) began making air conditioners and, beginning in 1950, many homes in the USA were equipped 【5】 central air conditioning. Central air conditioning uses a single unit【6】 （heat) or cool a whole house. With this, people could escape the heat of summer and the cold of winter no matter 【7】 they were in the house.

In the 1970s, electricity 【8】 （become) more expensive, so people developed 【9】(good) air conditioners to save money. Later, the cooling gas in air conditioners was found to pollute the environment, so engineers have been working to produce air conditioners more friendly to the environment 【10】 the 1980s.

Answer 1

【答案】

【1】was invented

【2】his

【3】making

【4】companies

【5】with

【6】to heat

【7】where

【8】became

【9】better

【10】since

【解析】

【1】was invented 考查动词的时态。根据in 1902可知用一般过去时，再根据句意可知用被动语态。

【2】his 考查代词。句意：他继续改善也的发明。

【3】making 考查非谓语动词 。句意：在1939年美国汽车公司把空调用于汽车，让驾驶更舒适。

【4】companies 考查名词的复数。根据many修饰可数的复数形式

【5】with 考查介词 。be equipped with 装备。

【6】to heat 考查非谓语动词 。句意：中间的空调用一个单独的单元来加热或冷冻到整个房间。

【7】where 考查让步状语从句。句意：用这个东西，无论在房间的哪个位置，人们在夏季可以凉爽。

【8】became 考查动词的时态。根据In the 1970s可知用一般过去时；

【9】better 考查形容词的比较级。句意：在20世纪70年代，电变得越来越贵，因此人们要更好的空调来省钱。

【10】since 考查连词。Since引导时间状语，主句用现在完成时；

考点 ：七选五。