He was fortunate ____ he did not get injured in the car accident.
There __________ some old black leather baskets in the corner of the dust room.
The old man used __________ in front of his house and he has got used to __________ like that.
I found the homework was not so heavy as __________ I __________ to get in my old school.
—May I ask a question after class, Sir?— __________, but not during my lunch break.
Many people have fully realized it's important to keep __________ balance of __________ nature. Otherwise, humans will be punished by it.