It seems to some experts that there are only three commonly-used vedio websites in this area: 56.com, Youku.com, Tudou.com and they_______ 90% of the market.(成都市)
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.
He lost his __________ and fell off his bicycle.