根据短文内容, 从下面A到F选项中选出能够概括每段主题的最佳选项, 选项中有一项为多余项

A. Tools of thought B. A reflection of your personality C. An indication of your intelligence D. The explosive effect of words E. A direction of the history F. Change the direction of your life

 
(填涂说明：E="A+D  " F="B+D  " G="C+D" )

The extent of your vocabulary indicates the degree of your intelligence. Your brain power will increase as you learn to know more words. Here's the proof. Two classes in a high school were selected for an experiment. Their ages and their environment were the same. Each class represented an identical cross-section of the community. One, the control class, took the normal courses. The other class was given special vocabulary training. At the end of the period the marks of the latter class surpassed those of the control group, not only in English, but in every subject, including mathematics and the sciences. Similarly it has been found by Professor Lewis M.Terman, of Stanford University, that a vocabulary test is as accurate a measure of intelligence as any three units of the standard and accepted Stanford-Binet I.Q. tests.

The study of words is not merely something that has to do with literature. Words are your tools of thought. You can't even think at all without them. Try it. If you are planning to go down town this afternoon you will find that you are saying to yourself: "I think I will go down town this afternoon." You can't make such a simple decision as this without using words. Your words are your keys for your thoughts. And the more words you have at your command the deeper, clearer and more accurate will be your thinking.

A command of English will not only improve the processes of your mind. It will give you assurance; build your self-confidence; lend color to your personality; increase your popularity. Your words are your personality. Your vocabulary is you. Your words are all that we, your friends, have to know and judge you by. You have no other medium for telling us your thoughts-for convincing us, persuading us, giving us orders.

Words are explosive. Phrases are packed with TNT.A simple word can destroy a friendship. The proper phrases in the mouths of clerks have quadrupled the sales of a department store. The wrong words used by a campaign orator have lost an election. For instance, on one occasion the four unfortunate words, "Rum, Romanism and a Rebellion" used in a Republican campaign speech threw the Catholic vote and the presidential victory to Grover Cleveland. Ears are won by words. Soldiers fight for a phrase. "Make the world safe for Democracy." "All out for England." "V for Victory." The " Remember the Maine" of Spanish war days has now been changed to "Remember Pearl Harbor."

Words have changed the direction of history. Words can also change the direction of your life. They have often raised a man from mediocrity to success. If you consciously increase your vocabulary you will unconsciously raise yourself to a more important station in life, and the new and higher position you have won will, in turn, give you a better opportunity for further enriching your vocabulary. It is a beautiful and successful cycle.
（ Today’s opportunity erase yesterday’s failures.）