I thought I knew the way to the Botanic Garden, but ______ I got lost.

Ihad just stepped out of the bathroom and was busily drying myself with a towel I heard the steps.[ ]

He used to spend a lot of time computer games.

Whether eating out will cause certain cancers has remained ______; experts are still finding evidence to prove the truth.

172. Since the disaster of September 11, American economy has got into a jam. The underlined part probably means _____.