She was so lost in her own thought that she was not _____ the coming danger .
He looked around and caught a man _____ his hand into the pocket of a passenger.
Don’t leave the water ____ while you brush your teeth.
Having been ill in bed for nearly a month ,he had a hard time________ the exam.
It is believed that if a book is________, it will surely________the reader.
You've missed your ____, and you will have to wait for the next round.