with experience  do  much  look  because  when  speak  time  notice  polite  go
It is often said that eyes can speak. Do you have such kind of  ?
On a bus, you may look at a stranger, but not too long. If he    that he is being looked at, he may feel uncomfortable. It is the same in daily life. someone looks at you for several times, you will look up and down to see if there is anything wrong with you. If nothing    wrong, you will feel angry the person who is looking at you. Eyes can____, right?
Looking too long at someone may seem to be  . But sometimes things are different. If you wish to draw someone’s attention, you may look at him or her for    than ten seconds. For lovers, they enjoy    at each other longer to show the love that words can’t express.
In short, eye communication should be  according to the relationship between the two people and the certain situation.