精选优质文档-倾情为你奉上高三英语专题：完形填空完形填空精讲精练（20篇下）（十一）（A）2007上海卷Being alone in outer space can be frightening. That is one reason why astronauts on solo (单独的) space flights were given plenty of work to keep them 45 . They were also in constant communication with people on the earth. 46 , being with people from whom you cannot get away might be even harder than being alone. This is what happens on long submarine(潜水艇) voyages. It will also happen on 47 space flights in the future.
