—“Dear Frank, when will our wedding be?”  —“Ah, when? God knows.” He said, and ____ away from her, walked rapidly away. 

He made a mistake, so he told a lie to avoid ______.

With a lot of difficult problems _______, the newly-elected president is having a hard time. 

Nearly four hundred supermarkets in Beijing are preparing to dim(使暗淡) their lights ________ the "Earth Hour 2010" on Saturday night．

 I was deep in thought, so I didn't notice _____.