. If it ______ for the fence, he ______ into the river. A. were not; fallen B. had not been; could have fallen C were not; could fall D. had not been; could fall
I__________ letters this morning and I__________ for four hours so far.
They __________ on the program for almost one week before I joined them, and now we __________ it as no good results have come out so far.
—Hi, Tracy, you look tired. —I am tired. I__________ the living room all day.
I think we can safely __________ that interest rates will go up again soon.
We must seize this opportunity and take proper measures to __________ the growth of our economy.