【推荐1】A server (服务器) should only be _______ (access) on a limited number of ports (端口).(所给词的适当形式填空)

【推荐2】These documents are not________ (access) to the public. (所给词的适当形式填空)

【推荐3】They are planning a new program making science more ________ (access) to young people. （所给词的适当形式填空）

【推荐1】Doing regular exercise every week keeps you ________(health). (所给词的适当形式填空)

【推荐2】Cao and Wu also collected garbage along the road, in order to promote environmental ________ (protect). Cao believes this will make the hiking trip even more ________ (meaning). The two of them collected more than 1,000 plastic bottles along the 40-day journey. （所给词的适当形式填空）

【推荐3】I do hope you will find my suggestions ________(benefit) and make great progress in Chinese. （所给词的适当形式填空）