英语完形填空，这道题怎么做：请在空白的括号内填上正确的单词或词汇。

Question

The basic principle of radar is illustrated by what happens when one shouts in a e . The echoof the shouting （ ） the walls helps a person determine the size of i cave With radar , however , the waves are radio waves instead of （ ）waves . dio waves travel （ ） the speed of light , about 300 , 000 ki lometers in a second . A lar set IA a short burst f radio waves . Then it receives the echoes （ ）when waves bounce ( Silt ) off ob iects By determining the time it （ ）for the echoes to imi to the radar set , a trained technician （ ）determine the distance between the lar set and other ob jects . The word " radar " , （ ）gets its name from the term dio detection and ranging . " " Rang ing is the term for detection of the （ ）between ob ject and the radar set Besides being of critical importance to pilot , radar is （ ） for air traffic contr track ing ships at sea , and for tracking weather systens and storms

Answer 1

1.A. through
B. for
C. on
D. against
2.A. sound
B. light
C. heat
D. tide
3.A.in
B. at
C. over
D. on
4.A.sends
out
B.works out
C. figures out
D. puts out
5.A.
producing
B. produced
C. produce
D. produces本回答被提问者采纳

Answer 2

一、跳过空格，了解大意。解题时先跳过空格，通读完形填空的短文，了解全篇的内容和要旨。要重视首句，善于以首句的时态、语气为立足点，理清文脉，推测全文主题及大意。二、复读短文，判断词形。把握短文大意后再认真复读短文，利用上下文的语境，结合所学过的知识，先确定空格处所需词语的意义，再根据空格在句子中的位置，判断其在句中充当的成分，从而确定所填词的词性，再依据词语搭配和语法规则，判断所填的词的正确形式。三、三读短文，验证答案。在短文的每一空白处填上一个词后，将完成的短文再细读一遍，上下参照，连贯思考。把所填的答案放入短文中进行检验，可从上、下文内容是否协调一致、顺理成章，语法结构是否正确无误等进行综合验证，凡有疑问必须重新推敲考虑。完形填空完形填空是测验常见的题型之一，即选择最恰当的单词或词组完成文章，该词条将讲述什么是完形填空，完形填空有什么类型，如何解决完形填空此类题目。本回答被网友采纳