---I haven't got the reference book yet, but I'll have a test on the subject next month. ---Don't worry. Youhave it by Friday.
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.