(2014兰州)根据汉语意思翻译句子。
有时候，直到珍贵的时刻成为回忆，你才会真正认识到它的价值所在。
Sometimes，you won’t know the true value of a moment________it becomes a memory．
根据首字母提示写出所缺的单词。
The sun appeared a________the horizon．
根据首字母提示写出所缺的单词。
The old lady was still breathing．We were surprised to know she wasn’t dead．She was still a________．
After all the students took their seats，the headmaster________．
A．show up
B．show off
C．showed up
D．showed off
(2013莱芜)You’d better make a good plan________you take a holiday．
A．before
B．during
C．until
D．after
(2014河南)This bus doesn’t go to the train station．I’m afraid you’ll have to________at the library and take the A52．
A．take off
B．put off
C．get off
D．turn off
