You __________ to leave until you __________ your work.
____ speaking, I didn’t do it on purpose.
It sounds like a good plan, but there are some _____ difficulties in carrying it out.
His father possesses a __________ factory, which does most of the pollution to this river.
—On the contrary, I think it is the mother, rather than her children, ___ to blame. —I agree with you.
____ road may lie ahead, that road will take me home.