一道英语完型填空题,其中有几个空不清楚.

一道英语完型填空题,其中有几个空不清楚.
In their talks,Americans often try to be frank .They like to talk fairly 1openly about their families,jobs and feelings.This is their 2way to express friendliness and sincerity (真挚).They like to 3use phrases such as “Tell it like it is,” “Don’t beat around the bush,” and “Get 4right to the point.” They want to know 5what the things really are or seem to be,as well as a person’s 6real feelings on many matters.Certain kinds of 7information,however,are shared with only 8close friends; do not ask an American about his or her salary,the 9cost of expensive items (产品),romantic interests,or the 10age.Many people do not like to be 11asked how much they weigh or details about their marriage,especially in mixed company.If people 12start raising their eyebrows at you,this may mean your 13questions or talk are unexpected or 14may not be in good taste.Sports are often a 15safe topic of talk.
第1、4、5、6、15项（选项没有打出来）.第1项选openly为什么不选freely,意思差不多啊?
第4项为什么不选out、awa、nearly
第5项为什么不选how、where、why而选what
第6项为什么不选sad、happy、good而选real
第15项为什么选safe不选danger