That paint is wet, you ___ touch it.
My sister has never played tennis before. This is the first time she __________ to play.
It’s supposed that __________ miners live __________ life full of danger.
-- You ought to have given them some advice. --- , but who cared what I asked?
---You’ve read the Frog by Moyan,haven’t you? ---Yes,I_______second time and I got a better understanding.
We should get prepared for dealing with ________problems_________