“I’m more nervous right now than when I _______,”Jane said ,as she saw a group of reporters waiting anxiously at the exit of the gymnasium.

Measures have been taken to prevent the accidents, but much _____ for more improvement.

The house is dirty because it  since they moved out.

Though having lived abroad for years, many Chinese still_______the traditional customs.

------What's the matter with Tim? ------Oh, Tim's cell phone was left in a taxi accidentally, never ________ again.