The heavy fog in London made ______deep impression on us, which was sometimes so heavy that we lost _______sight of everything around us.
— I’m sorry.I ________ at you the other day. — Forget it.I was a bit out of control myself.
_____ with so much trouble,we failed to complete the task on time.
________ around the Water Cube,we were then taken to see the Bird’s Nest.
I have ______ all the papers but I still can’t find my notes.
_____in the sports world,a sportsman needs to train constantly to keep himself in best condition.