【单选题】He knew the problem was serious and promised to look into it _____ he reached office.
【简答题】When he left his parents he promised them that he would ______(尽量多写家信).
【单选题】只从数字上来讲,IPv6地址所拥有的地址容量达到( )。
【单选题】Plato and Confucius believed that physical training was an important part of education.
【单选题】He knew the problem was serious and promised to look into it ____ he reached office. [ ]
【单选题】He ____ to come today, but he didn't keep his ____. [ ]