(2013娄底)—Always look around________you cross the street，David．
—OK，I know，Mom．
A．until
B．before
C．unless
She looked at me________disbelief when I told her the news．
A．with
B．on
C．in
D．for
Keep________till you see the light，then turn right．
A．walk
B．to walk
C．walked
D．walking
(2013·河北)The children decide________ their schoolyard this Friday afternoon．
A．clean
B．to clean
C．cleaning
D．cleaned
根据汉语意思完成句子。
在音乐会结束的时候，我看到她就坐在我的旁边。
________，I saw her sitting next to me．
(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．
