—It's dangerous to take photos of lightning.—The challenge is not for ________, but I think it's worth attempting.
Public attention at the moment is focused ________ the problem of environment balance.
The wounded soldier escaped ________ in the fighting.
—Hey,look where you are going... —Oh,I’m terribly sorry.________.
Forgive him,please. I don’t think he broke your ruler ________.
I wasn’t blaming anyone;I ________ said errors like this could be avoided.