---I’m sorry! I would have taken him to hospital if I had known he was seriously ill.--- But ______ .
He can’t tell us ________, I think.
The Huang River is the second __________ river in our country.
The light in the office wasn’t ________for him to read.
There was an accident at the corner. ________, the girl wasn’t _________hurt.
You must keep your eyes _________ when you do eye exercises.